GM Service Manual Online
For 1990-2009 cars only

HVAC Module Assembly Replacement LHD Bench Overhaul

Removal Procedure


    Object Number: 860970  Size: SH
  1. Remove the HVAC module.
  2. Remove and discard the cowl panel seals.

  3. Object Number: 860393  Size: SH
  4. Remove the mode valve assembly screws and clips.
  5. Lift the mode valve assembly straight up to remove from HVAC module.

  6. Object Number: 860430  Size: SH
  7. Remove the upper air inlet case screws and spring clips.
  8. Lift the upper air inlet case assembly straight up to remove from lower case assembly.

  9. Object Number: 860434  Size: SH
  10. Remove the evaporator pipe clamp and screw.
  11. Lift the evaporator straight up to remove from lower case assembly.

Installation Procedure


    Object Number: 860434  Size: SH
  1. Assemble the water filter, retainers, evaporator seal and spacer pad to the new evaporator. Add 67 ml (2.25 oz) of PAG refrigerant oil and replace evaporator pipe cover.
  2. Evaporator part will come with filter and pad already installed. 67 ml (2.25 oz) of oil will still have to be added to the evaporator.

  3. Lower the evaporator into the lower case assembly.
  4. Install the evaporator pipe clamp and the screw.
  5. Important: Make sure the evaporator pipes are wrapped with mastic on part being installed.


    Object Number: 860427  Size: SH
  6. Place the upper air inlet case on the lower case assembly.
  7. Notice: Make sure all tongue and groove parts fit properly before tightening screws to avoid case damage.

  8. Install the upper air inlet case screws and spring clips.

  9. Object Number: 860393  Size: SH

    Notice: Make sure all tongue and groove parts fit properly before tightening screws to avoid case damage.

  10. Install the mode valve and screws.

HVAC Module Assembly Replacement LHD

Removal Procedure


    Object Number: 903916  Size: SH
  1. Disable the SIR system. (Refer to "Disabling the SIR System" in this service manual.)
  2. Record the pre-set radio stations.
  3. Disconnect the negative battery cable.
  4. Recover the refrigerant using an approved refrigerant recovery system.
  5. Remove the air cleaner housing cover and air induction hose at the intake manifold.

  6. Object Number: 905369  Size: SH
  7. Remove the suction hose and liquid line from the thermal expansion valve.

  8. Object Number: 1200125  Size: SH
  9. Remove the thermal expansion valve from the evaporator.
  10. Notice: Place protective covers over A/C hoses, lines, TXV, and HVAC module to prevent contamination of A/C system.

  11. Remove the coolant reservoir cap
  12. Drain the cooling system.
  13. Remove the heater inlet hose from the engine outlet and blow remainder the coolant out of the heater core with an air hose in order to prevent coolant from spilling on the vehicle interior when removing HVAC module.
  14. Install the heater inlet hose on the engine outlet and position clamp at 4 o'clock position as viewed from the left side of the vehicle.

  15. Object Number: 859627  Size: SH

    Caution: Ensure that the vehicle is properly supported and squarely positioned. To help avoid personal injury when a vehicle is on a hoist, provide additional support for the vehicle on the opposite end from which the components are being removed.

  16. Raise the vehicle.
  17. Move the clamps up the heater core inlet and outlet hoses.

  18. Object Number: 859635  Size: SH
  19. Remove the hoses from the heater core
  20. Lower the vehicle.

  21. Object Number: 903726  Size: SH
  22. Remove the screws and carefully pull right and left end cap assemblies outward at clip locations.

  23. Object Number: 877947  Size: SH
  24. Remove the screws and remove the arm rest, if equipped.

  25. Object Number: 880172  Size: SH
  26. Lift the parking brake lever.
  27. Remove the screw.
  28. Remove the parking brake cover by lifting straight off lever.

  29. Object Number: 903885  Size: SH
  30. Move the shifter to neutral. Remove the ashtray from the cup holder by lifting straight out.
  31. Remove the cup holder from the console by pulling upwards starting at the rear edge.

  32. Object Number: 903988  Size: SH
  33. Remove the ashtray bulb socket by lifting tab while sliding socket forward. Then pull socket straight out.
  34. Remove the wiring harness from the cup holder.

  35. Object Number: 903887  Size: SH
  36. Remove the window/mirror switch, if equipped, by sliding switch forward then lifting at the rear edge. Disconnect the electrical connectors.

  37. Object Number: 903985  Size: SH
  38. If the vehicle does not have an arm rest, remove the rear screw cover by lifting at cut out.
  39. Remove the rear console screws.

  40. Object Number: 878799  Size: SH
  41. Remove left and right lower trim panel extensions by pulling outward at dual lock locations. Then rotate the panels outward to disengage hinges from console.

  42. Object Number: 903983  Size: SH
  43. Remove the front console screws.
  44. Move console rearward.
  45. Disconnect the cigarette lighter electrical connector.
  46. Remove the bulb socket from cigarette lighter by rotating clockwise and pulling straight out.

  47. Object Number: 903992  Size: SH
  48. On automatic transmission equipped vehicles, tape the shifter button in to clear shifter opening.
  49. Lift the console at rear. Slide the console rearward and lift straight up to remove.

  50. Object Number: 881349  Size: SH
  51. Depress the center pins inward to release radio/HVAC controller cover push pins fasteners.
  52. Important: Do not push the center pins through fasteners.

  53. Remove the fasteners and pull radio/HVAC controller cover rearward.
  54. Disconnect traction control/fog lamp/rear defog electrical connector if equipped.

  55. Object Number: 877964  Size: SH
  56. Remove the radio screws.
  57. Push the spring clips in through D-holes on both sides of radio brace.
  58. Pull the radio out slightly to access the rear of the radio.

  59. Object Number: 877967  Size: SH
  60. Disconnect the electrical connector and antenna.
  61. Remove the radio.

  62. Object Number: 1200114  Size: SH
  63. Disconnect blower switch, A/C-Recirc and lighting electrical connectors.

  64. Object Number: 903907  Size: SH
  65. Remove the temperature and mode cables from HVAC control by squeezing lock tabs together while pulling cable housing straight up.
  66. Remove the cables from pins by pulling straight up. (Service cables shown in illustration.

  67. Object Number: 903908  Size: SH
  68. Remove the screws and HVAC controller.

  69. Object Number: 903717  Size: SH
  70. Remove the closeout seal by releasing from tabs.

  71. Object Number: 903644  Size: SH
  72. Remove the screw and ground wire from H-bracket.
  73. Remove the wiring harness from H-bracket.

  74. Object Number: 882260  Size: SH
  75. Remove the screw and disconnect the rear electrical connector from the instrument panel block screw.

  76. Object Number: 903647  Size: SH
  77. Remove the instrument panel junction block screw.
  78. Insert a small flat blade screwdriver from passenger side, to release lock tabs on the instrument panel junction block and slide off of mounting pads.
  79. Feed the instrument panel junction block through H-brackets towards the front of the car.

  80. Object Number: 903842  Size: SH
  81. Remove the bolts from H-Bracket.

  82. Object Number: 878779  Size: SH
  83. Remove the screws from the data link connector(DLC) and steering column filer panel.

  84. Object Number: 866299  Size: SH
  85. Remove the hood release cable from the lever by releasing the cable housing, then rotating the cable downward to cutout.
  86. Remove the steering column filler panel.

  87. Object Number: 866290  Size: SH
  88. Disconnect the ignition switch electrical connector at the right steering column bolt.
  89. Remove the steering column bolts and the lower column on the front seat.

  90. Object Number: 904866  Size: SH
  91. Remove the fasteners and pull the instrument cluster trim bezel rearward at clip locations.
  92. Disconnect the electrical connector from the instrument panel dimmer switch.

  93. Object Number: 904867  Size: SH
  94. Remove the connector position assurance (CPA) devices and disconnect the electrical connectors from the instrument cluster by squeezing the tabs on each side of connector.

  95. Object Number: 904869  Size: SH
  96. Remove the front and rear instrument cluster screws.
  97. Remove the instrument cluster.

  98. Object Number: 904870  Size: SH
  99. Remove the dimmer switch wiring harness from the instrument panel reinforcement.
  100. Remove the passenger side air bag harness from cross car beam and energy absorber.

  101. Object Number: 903854  Size: SH
  102. Remove the passenger side air bag harness from the cross car beam and energy absorber.

  103. Object Number: 878745  Size: SH
  104. Remove the glove box door stops by rotating 90 degrees and let door hang down.
  105. Remove the screws from the glove box and compartment and striker.
  106. Remove the glove box assembly by pulling rearward at the clip locations.

  107. Object Number: 862524  Size: SH
  108. Disconnect the antenna cable at the lower right side of the instrument panel reinforcement.

  109. Object Number: 1200155  Size: SH
  110. Use the illustration to determine fastener location and direction of removal.

  111. Object Number: 1200184  Size: MF
  112. Remove the nut, screws and instrument panel pad/reinforcement assembly.

  113. Object Number: 860403  Size: SH
  114. Remove the I/P lower closeout panel by pulling out at the top edge, and then rotating the top downward.

  115. Object Number: 859434  Size: SH
  116. For Sedans and Wagons, remove the lower heater duct. (Refer to Heater Core Removal" in this service manual.)
  117. Lift rear floor heater duct off of the mounting bolt and remove.
  118. Notice: Be careful not to damage foam seal.


    Object Number: 859441  Size: SH
  119. Remove the screws and center air outlet duct.

  120. Object Number: 872993  Size: SH
  121. Remove the screws and unsnap windshield defroster nozzle from the mode valve assembly

  122. Object Number: 877958  Size: SH

    Important: For SC1 and SC2 vehicles, leave the defroster nozzle in place after disconnecting. Nozzle cannot be removed because of windshield rake angle.

  123. Remove the defroster nozzle by rotating front of nozzle up and away from the windshield.

  124. Object Number: 903661  Size: SH
  125. Disconnect the blower motor resistor connector.
  126. Remove the wire harness and hold down clips from the HVAC module.

  127. Object Number: 859704  Size: SH
  128. Disconnect the blower motor and recirc motor electrical connectors.

  129. Object Number: 862534  Size: SH
  130. Remove the wiring harness and hold down the clips from the HVAC module.

  131. Object Number: 859886  Size: SH
  132. Remove the fuel vapor line and clip from the HVAC module stud to gain access to the nut.
  133. Remove the three screws and two nuts holding the HVAC module to the cowl.
  134. Fastener Locations:


    Object Number: 860003  Size: SH
    • Bolt to the upper right side of TXV.
    • Bolt below to the heater core outlet pipe.
    • Bolt just above the HVAC module case drain.
    • Nut to the upper left of heater core inlet pipe (below TXV).
    • Nut on the left side of the cowl

       Important: Lower the fasteners may be easier to access by raising vehicle.


    Object Number: 859609  Size: SH
  135. Remove the HVAC module from the vehicle.

Installation Procedure


    Object Number: 860970  Size: SH
  1. Install the new cowl panel seals on the heater core pipes, case drain, and evaporator block.

  2. Object Number: 859622  Size: SH
  3. Install the HVAC module through the cowl. Install the screws and nuts.
  4. Tighten
    Tighten to 5 N·m (44 lbs in)

  5. Install the fuel vapor line and clip to stud below TXV.

  6. Object Number: 906770  Size: SH
  7. Connect the blower motor and recirc motor electrical connectors.
  8. Install the wire harness hold down clips on HVAC module.

  9. Object Number: 903661  Size: SH
  10. Connect the blower motor resistor electrical connector.
  11. Install the wire harness hold down clips on the HVAC module.

  12. Object Number: 877962  Size: SH
  13. Rotate the windshield defroster nozzle onto mode valve assembly and install screws. Make sure the duct is snapped on both sides of HVAC module.
  14. Tighten
    Tighten to 2.2 N·m (20 lbs in)


    Object Number: 906889  Size: SH
  15. Install the center air outlet duct and screws.
  16. Tighten
    Tighten to 10 N·m (89 lbs in).

    Important: Make sure that the plastic right mounting tab is between knee beam and mounting bracket.


    Object Number: 903497  Size: SH
  17. For SL and SW only, install the rear floor heater duct and place on mounting stud.
  18. Notice: Be careful not to damage foam seal.

  19. Install the lower heater duct.

  20. Object Number: 1200184  Size: MF
  21. Install the instrument panel pad/reinforcement assembly.
  22. Important: Make sure wiring harnesses and instrument panel junction block are in position.

  23. Install and tighten the nut and bolts.
  24. Tighten
    Tighten to 10 N·m(89 lbs in).


    Object Number: 862524  Size: SH
  25. Connect the antenna cable at lower right side of the instrument panel reinforcement.

  26. Object Number: 878745  Size: SH
  27. Install the glove box and snap in at the clip locations.
  28. Install and tighten the screws.
  29. Tighten
    Tighten to 2.2 N·m (20 lb in).

  30. Install the glove box door stops.
  31. Adjust the striker as necessary.

  32. Object Number: 903854  Size: SH
  33. Install the passenger side air bag harness to energy absorber and cross-car beam

  34. Object Number: 904870  Size: SH
  35. Install the dimmer switch wiring harness to instrument panel reinforcement.

  36. Object Number: 904869  Size: SH
  37. Install the instument cluster.
  38. Install and tighten the screws.
  39. Tighten
    Tighten to 3 N·m (26 lbs in).


    Object Number: 904867  Size: SH
  40. Connect the electrical connectors to the instrument cluster.
  41. Install the CPA.

  42. Object Number: 904866  Size: SH
  43. Connect the electrical connector to the dimmer switch.
  44. Install the instrument cluster trim bezel. Push in at the clip locations.
  45. Install the push pin fasteners.

  46. Object Number: 866290  Size: SH
  47. Raise the steering column into position.
  48. Install and tighten the bolts.
  49. Tighten
    Tighten the 35 N·m (26 lbs ft).

  50. Connect the ignition switch electrical connector at the right steering column bolt.

  51. Object Number: 866299  Size: SH
  52. Route the hood release cable through I/P and then install release cable to lever.

  53. Object Number: 878779  Size: SH
  54. Install the steering column filler panel and DLC.
  55. Install and tighten the screws.
  56. Tighten
    Tighten to 2.2 N·m (20 lbs in).


    Object Number: 903842  Size: SH
  57. Install and tighten bolts into H-bracket.
  58. Tighten
    Tighten bolts to 25 N·m (19 lbs in).


    Object Number: 903647  Size: SH
  59. Feed the instrument panel juction block through the H-bracket towards the rear of the car.
  60. Slide the IPJB on mounting pads to lock the tabs.
  61. Install and tighten IPJB screw.

  62. Object Number: 882260  Size: SH
  63. Connect the rear electrical connector to IPJB
  64. Tighten the screw.
  65. Tighten
    Tighten to 6.5 N·m (5 lbs ft).


    Object Number: 903644  Size: SH
  66. Install the wiring harness, ground wire and screw to H-bracket.
  67. Tighten the screw
  68. Tighten
    Tighten to 2.2 N·m (20 lbs in).


    Object Number: 903717  Size: SH
  69. Install the closeout seal.
  70. Important: Make sure the tabs engage closeout seal holes on both sides

  71. Install HVAC control.
  72. Install and tighten screws.
  73. Tighten
    Tighten to 2.5 N·m (2.2 lbs in).


    Object Number: 903907  Size: SH
  74. Install the temperature and mode cables over the pins

    Cable Identification:

    • Temperature cable- white
    • Mode cable-black
  75. Install cable housings into channel and push down to lock.

  76. Object Number: 1200114  Size: SH
  77. Connect the blower switch, A/C-Recirc and lighting electrical connectors.
  78. Important: Make sure wiring harnesses do not interfere with control lever movement.


    Object Number: 877967  Size: SH
  79. Connect the electrical connector and antenna to radio.

  80. Object Number: 877964  Size: SH
  81. Install the radio.
  82. Important: Make sure spring clips are seated in D-holes on both sides.

  83. Install and tighten the screws.
  84. Tighten
    Tighten to 2.5 N·m (22 lbs in).


    Object Number: 881349  Size: SH
  85. Connect the traction control/fog lamp/rear defog electrical connector, if equipped.
  86. Install the radio/HVAC control cover. Push in at clip locations.
  87. Install the push pins and lock.

  88. Object Number: 903992  Size: SH
  89. Place the shifter in neutral.
  90. Lower the front of the console over shifter.
  91. Lower the rear of the console over parking brake lever onto rear mounting pad.
  92. Important: Make sure to place window/mirror and ashtray light connectors through openings into position.


    Object Number: 903286  Size: SH
  93. Move the console rearward.
  94. Install the cigarette lighter bulb through opening and rotate counterclockwise.
  95. Connect cigarette lighter electrical connector.
  96. Move the console forward into position.
  97. Important: Make sure that the upper tabs on front of the console engage sheet metal on lower I/P brace.

  98. Install and tighten the front console screws.
  99. Tighten
    Tighten to 1.2 N·m (11 lbs in).


    Object Number: 878799  Size: SH
  100. Install the left and right lower trim panel extensions by inserting hinges into console openings. Then rotate closed and push in at dual lock location.

  101. Object Number: 903985  Size: SH
  102. For vehicles without the console armrest:
  103. • Align the rear of console with pin on mounting pad.
    • Install and tighten screws.

    Tighten
    Tighten to 1.6 N·m (14 lb in).

    • Install the screw cover.

    Object Number: 903887  Size: SH
  104. Connect the window/mirror switch electrical connectors.
  105. Install the window/mirror switch by inserting front edge into opening. Then push the rear edge down into position.

  106. Object Number: 903990  Size: SH
  107. Insert the bulb through the opening until bulb socket is flush with cup holder. Push socket down to engage lock tab.
  108. Install the wiring harness to the cup holder.

  109. Object Number: 903885  Size: SH
  110. Install the cupholder by inserting through console opening and pushing straight down,

  111. Object Number: 880172  Size: SH
  112. Install the parking brake cover over lever.
  113. Install and tighten the screw.
  114. Notice: Do not overtighten screw or it may pull through cover.

    Tighten
    Tighten to 1.6 N·m (14 lbs in).


    Object Number: 877947  Size: SH
  115. Install the arm rest unit into the console, if equipped. Install and tighten the screws.
  116. Tighten
    Tighten to 1.6 N·m (14 lbs in).


    Object Number: 903726  Size: SH
  117. Install the right and left end cap assemblies.
  118. Install and tighten the screws.
  119. Tighten
    Tighten to 2.2 N·m (20 lbs in).


    Object Number: 861027  Size: SH

    Caution: Ensure that the vehicle is properly supported and squarely positioned. To help avoid personal injury when a vehicle is on a hoist, provide additional support for the vehicle on the opposite end from which the components are being removed.

  120. Raise the vehicle.
  121. Install hose and clamp on heater core outlet. Position the clamp at a 7-8 o'clock position

  122. Object Number: 861024  Size: SH
  123. Install the hose and clamp on the heater core inlet. Position the clamp at 6 o'clock.

  124. Object Number: 903304  Size: SH
  125. Lower the vehicle.
  126. Remove the protective covers. Lubricate with R-12 Refrigerant oil (mineral) install new O-rings on evaporator pipes.
  127. Install the thermal explosion valve (TXV) on evaporator.
  128. Tighten
    Tighten to 10 N·m (89 lbs ft).


    Object Number: 860574  Size: SH
  129. Lubricate O-rings with R-12 Refrigerant oil (mineral) and install new O-rings on suction hose and liquid line.
  130. Insall the liquid line on the TXV.
  131. Tighten
    Tighten to 25 N·m (19 lbs ft).

  132. Install the suction hose on the TXV.
  133. Tighten
    Tighten to 25 N·m (19 lbs ft).


    Object Number: 903916  Size: SH
  134. Install the air cleaner housing cover and air induction hose.
  135. Fill and pressure test the cooling system.
  136. Evacuate, charge, and leak test A/C system. Perform A/C Performance Test.
  137. Connect the negative battery cable.
  138. Tighten
    Tighten to 17 N·m (151 lbs in).

  139. Set the clock to proper time if equipped.
  140. Enable the SIR system. (Refer to "Enabling the SIR System" in this service manual.)
  141. Reset the radio stations.

HVAC Module Assembly Replacement RHDD

Removal Procedure


    Object Number: 903916  Size: SH
  1. Disable the SIR system. (Refer to "Disabling the SIR System" in this service manual.)
  2. Record the pre-set radio stations.
  3. Disconnect the negative battery cable.
  4. Recover the refrigerant using an approved refrigerant recovery system.
  5. Remove the air cleaner housing cover and air induction hose at the intake manifold.

  6. Object Number: 905369  Size: SH
  7. Remove the suction hose and liquid line from the thermal expansion valve.
  8. Notice: Place protective covers over A/C hoses, lines, TXV, and HVAC module to prevent contamination of A/C system.

  9. Remove coolant reservoir cap.
  10. Drain cooling system.
  11. Remove the heater inlet hose from the engine outlet and blow remainder the coolant out of the heater core with an air hose in order to prevent coolant from spilling on the vehicle interior when removing HVAC module.
  12. Install the heater inlet hose on the engine outlet and position clamp at 4 o'clock position as viewed from the left side of the vehicle.

  13. Object Number: 903310  Size: SH

    Caution: Ensure that the vehicle is properly supported and squarely positioned. To help avoid personal injury when a vehicle is on a hoist, provide additional support for the vehicle on the opposite end from which the components are being removed.

  14. Raise the vehicle.
  15. Move the clamps up the heater core inlet and outlet hoses.

  16. Object Number: 859635  Size: SH
  17. Remove the hoses from the heater core

  18. Object Number: 903414  Size: SH
  19. Remove for nuts holding lower HVAC module and blower unit to cowl.
  20. • Left upper side of TXV
    • Lower right side of TXV
    • Left of module drain
    • Lower left side of brake booster
  21. Lower the vehicle.

  22. Object Number: 860003  Size: SH
  23. Remove nut holding blower unit to cowl at right center of brake booster.

  24. Object Number: 904034  Size: SH
  25. Remove the screws and carefully pull right and left end cap assemblies outward at clip locations.

  26. Object Number: 877947  Size: SH
  27. Remove the screws and remove the arm rest, if equipped.

  28. Object Number: 904069  Size: SH
  29. Lift the parking brake lever.
  30. Remove the screw.
  31. Remove the parking brake cover by lifting straight off lever.

  32. Object Number: 904074  Size: SH
  33. Move the shifter to neutral. Remove the ashtray from the cup holder by lifting straight out.
  34. Remove the cup holder from the console by pulling upwards starting at the rear edge.

  35. Object Number: 903988  Size: SH
  36. Remove the ashtray bulb socket by lifting tab while sliding socket forward. Then pull socket straight out.
  37. Remove the wiring harness from the cup holder.

  38. Object Number: 904040  Size: SH
  39. Remove the window/mirror switch, if equipped, by sliding switch forward then lifting at the rear edge. Disconnect the electrical connectors.

  40. Object Number: 903985  Size: SH
  41. If the vehicle does not have an arm rest, remove the rear screw cover by lifting at cut out.
  42. Remove the rear console screws.

  43. Object Number: 904041  Size: SH
  44. Remove left and right lower trim panel extensions by pulling outward at dual lock locations. Then rotate the panels outward to disengage hinges from console.

  45. Object Number: 904043  Size: SH
  46. Remove the front console screws.
  47. Move console rearward.
  48. Disconnect the cigarette lighter electrical connector.
  49. Remove the bulb socket from cigarette lighter by rotating clockwise and pulling straight out.

  50. Object Number: 904044  Size: SH
  51. Lift the console at rear. Slide the console rearward and lift straight up to remove.

  52. Object Number: 881349  Size: SH
  53. Depress the center pins inward to release radio/HVAC controller cover push pins fasteners.
  54. Important: Do not push the center pins through fasteners.

  55. Remove the fasteners and pull radio/HVAC controller cover rearward.
  56. Disconnect traction control/fog lamp/rear defog electrical connector if equipped.

  57. Object Number: 903396  Size: SH
  58. Remove the radio screws.
  59. Push the spring clips in through D-holes on both sides of radio brace.
  60. Pull the radio out slightly to access the rear of the radio.

  61. Object Number: 903535  Size: SH
  62. Disconnect the electrical connector and antenna.
  63. Remove the radio.

  64. Object Number: 1200114  Size: SH
  65. Disconnect blower switch, A/C-Recirc and lighting electrical connectors.

  66. Object Number: 904136  Size: SH
  67. Remove the temperature and mode cables from HVAC control by squeezing lock tabs together while pulling cable housing straight up.
  68. Remove the cables from pins by pulling straight up. (Service cables shown in illustration.

  69. Object Number: 866646  Size: SH
  70. Remove the screws and HVAC controller.

  71. Object Number: 904050  Size: SH
  72. Remove the closeout seal by releasing from tabs.

  73. Object Number: 904052  Size: SH
  74. Remove the screw and ground wire from H-bracket.
  75. Remove the wiring harness from H-bracket.

  76. Object Number: 882260  Size: SH
  77. Remove the screw and disconnect the rear electrical connector from the instrument panel block screw.

  78. Object Number: 903647  Size: SH
  79. Remove the instrument panel junction block screw.
  80. Insert a small flat blade screwdriver from passenger side, to release lock tabs on the instrument panel junction block and slide off of mounting pads.
  81. Feed the instrument panel junction block through H-brackets towards the front of the car.

  82. Object Number: 903842  Size: SH
  83. Remove the bolts from H-Bracket.

  84. Object Number: 904056  Size: SH
  85. Remove the screws from the data link connector(DLC) and steering column filer panel.

  86. Object Number: 860465  Size: SH
  87. Lower steering column filler panel and remove hood release handle assembly.
  88. Route hood release handle assembly forward through the I/P carrier to the cowl.

  89. Object Number: 904058  Size: SH
  90. Disconnect the ignition switch electrical connector at the right steering column bolt.
  91. Remove the steering column bolts and the lower column on the front seat.

  92. Object Number: 904077  Size: SH
  93. Remove the fasteners and pull the instrument cluster trim bezel rearward at clip locations.
  94. Disconnect the electrical connector from the instrument panel dimmer switch.

  95. Object Number: 904061  Size: SH
  96. Remove the connector position assurance (CPA) devices and disconnect the electrical connectors from the instrument cluster by squeezing the tabs on each side of connector.

  97. Object Number: 904083  Size: SH
  98. Remove the front and rear instrument cluster screws.
  99. Remove the instrument cluster.

  100. Object Number: 904093  Size: SH
  101. Remove the dimmer and defroster switch wiring harness from the instrument panel reinforcement using a screwdriver to remove rosebud retainer. Replace retainer if damaged during removal.
  102. Feed connectors through reinforcement towards front of car.

  103. Object Number: 904108  Size: SH
  104. Remove the passenger side air bag harness from cross car beam and energy absorber.

  105. Object Number: 904105  Size: MH
  106. Remove the glove box door stops by rotating 90 degrees and let door hang down.
  107. Remove the screws from the glove box and compartment and striker.
  108. Remove the glove box assembly by pulling rearward at the clip locations.

  109. Object Number: 904506  Size: SH
  110. Disconnect PCM electrical connectors.

  111. Object Number: 904528  Size: SH
  112. Loosen PCM retaining nut and lift PCM upward and remove.

  113. Object Number: 1200155  Size: SH
  114. Use the illustration to determine fastener location and direction of removal.

  115. Object Number: 903931  Size: MF
  116. Remove the nut, screws and instrument panel pad/reinforcement assembly.

  117. Object Number: 860600  Size: SH
  118. Detach wiring harness rosebud fastener from rear of HVAC module.

  119. Object Number: 860601  Size: SH
  120. Remove wiring harness rosebud fasteners from side of HVAC module.
  121. Remove wiring harness rosebud fastener from left module mounting bracket.

  122. Object Number: 860630  Size: SH
  123. Remove lower heater duct screws.

  124. Object Number: 860481  Size: SH

    Notice: Be careful not to damage foam seal.

  125. For Coupes, slide heater duct downward and then left, into passenger side footwell.
  126. For Sedans and Wagons, use a flat blade screwdriver to bend the right side heater duct flange outward at cut lines, then slide duct left into passenger side footwell with wiring harness.
  127. Remove BTSI cable from heater duct.

  128. Object Number: 904502  Size: SH
  129. Remove the screws and center air outlet duct.

  130. Object Number: 904565  Size: SH
  131. Remove the screws and unsnap windshield defroster nozzle from the mode valve assembly

  132. Object Number: 877958  Size: SH
  133. Remove the defroster nozzle by rotating front of nozzle up and away from the windshield.

  134. Object Number: 860836  Size: SH
  135. Disconnect the blower motor resistor connector.

  136. Object Number: 860831  Size: SH
  137. Disconnect the blower motor electrical connectors.

  138. Object Number: 904144  Size: SH
  139. Remove ABS module from HVAC module by gently pulling outward to disengage hook and loop fastener, and then rearward to disengage alignment pins.
  140. Disconnect ABS module electrical connector and remove module.
  141. Remove shift lock cable from clamp at front edge of heater pipe cover.

  142. Object Number: 860605  Size: SH
  143. Remove HVAC module mounting brackets to beam bolts.

  144. Object Number: 860723  Size: SH
  145. Remove blower unit bracket to cowl screw.

  146. Object Number: 860838  Size: SH
  147. Disconnect air valve actuator electrical connector.

  148. Object Number: 860719  Size: SH
  149. Remove blower unit from vehicle.

  150. Object Number: 860860  Size: SH
  151. Remove the HVAC module from the vehicle.

  152. Object Number: 860685  Size: SH
  153. Remove TXV from HVAC module.
  154. Place protective cover over evaporator pipes to prevent contamination of A/C system.

Installation Procedure


    Object Number: 860685  Size: SH

    Notice: Use only R-12 refrigerant oil to lubricate the O-rings. Use of R-134a (PAG) oil will cause premature corrosion of fitting joints. Do not lubricate seal washers.

  1. Install TXV to HVAC module.

  2. Object Number: 860736  Size: SH
  3. Install the new cowl panel seals on the heater core pipes, case drain, and evaporator block.

  4. Object Number: 859622  Size: SH
  5. Install the HVAC module through the cowl.

  6. Object Number: 860605  Size: SH
  7. Install HVAC module mounting bracket to beam bolts, but do not tighten.

  8. Object Number: 860838  Size: SH
  9. Connect air valve actuator electrical connector.

  10. Object Number: 860719  Size: SH
  11. Install blower unit into HVAC module and through cowl.

  12. Object Number: 860723  Size: SH
  13. Install blower unit bracket to cowl bolt.
  14. Tighten
    Tighten to 2.2 N·m (20 lbs in)


    Object Number: 860003  Size: SH
  15. Install blower unit to cowl nut at right side of brake booster.
  16. Tighten
    Tighten to 5 N·m (44 lbs in)

    Caution: Ensure that the vehicle is properly supported and squarely positioned. To help avoid personal injury when a vehicle is on a hoist, provide additional support for the vehicle on the opposite end from which the components are being removed.

  17. Raise vehicle.
  18. Install HVAC module and blower unit nuts.
  19. Tighten
    Tighten to 5 N·m (44 lbs in)


    Object Number: 903310  Size: SH

    Important: Be careful not to push hoses onto heater core pipes so far that foam seal is contacted.

  20. Install hose and clamp on heater core outlet. Install clamp at 7-8 o'clock position.
  21. Install hose and clamp on heater core inlet. Install clamp at 6 o'clock position.
  22. Lower vehicle.

  23. Object Number: 860605  Size: SH
  24. Tighten HVAC module mounting brackets to beam bolts.
  25. Tighten
    Tighten to 6 N·m (53 lbs in)


    Object Number: 860831  Size: SH
  26. Connect the blower motor electrical connector.

  27. Object Number: 904144  Size: SH
  28. Connect ABS module electrical connector.
  29. Install ABS module alignment pins into HVAC module flange and rotate ABS module toward HVAC module to engage hook and loop retainer.
  30. Install park lock cable into clamp at forward edge of heater pipe cover.

  31. Object Number: 860836  Size: SH
  32. Connect the blower motor resistor electrical connector.

  33. Object Number: 904565  Size: SH
  34. Install windshield defroster nozzle onto HVAC module and install screws. Make sure the duct is snapped on both sides of HVAC module.
  35. Tighten
    Tighten to 2.2 N·m (20 lbs in)


    Object Number: 904502  Size: SH
  36. Install the center air outlet duct and screws.
  37. Tighten
    Tighten to 10 N·m (89 lbs in).


    Object Number: 860654  Size: SH
  38. Install brake transaxle interrupt cable into heater duct clamp.
  39. Notice: Be careful not to damage foam seal.

  40. Install heater duct to HVAC module.
  41. For Coupes, slide duct under HVAC module from left side and raisee into installed position. Install heater duct screws.


    Object Number: 860638  Size: SH
  42. Install heater duct to HVAC module.
  43. For Sedans/Wagons cut right heater duct flange off as shown, and slide duct into position between HVAC module and rear seat heater duct. Install left heater duct screw.


    Object Number: 860600  Size: SH
  44. Install wiring harness rosebud fastener at rear of HVAC module.

  45. Object Number: 860601  Size: SH
  46. Install wiring harness fastener into side of HVAC module.
  47. Install wiring harness fastener into left HVAC module bracket.

  48. Object Number: 903931  Size: MF
  49. Place instrument panel junction block in position.
  50. Important: Make sure PSIR connector harness is on top of beam.

  51. Install the instrument panel pad/reinforcement assembly.
  52. Install and tighten the nut and bolts.
  53. Tighten
    Tighten to 10 N·m(89 lbs in).


    Object Number: 904520  Size: SH
  54. Install PCM into mounting bracket and tighten nut.
  55. Tighten
    Tighten to 10 N·m(89 lbs in).


    Object Number: 904506  Size: SH
  56. Connect PCM electrical connectors.

  57. Object Number: 904108  Size: SH
  58. Install the passenger side air bag harness to energy absorber and cross-car beam

  59. Object Number: 904093  Size: SH
  60. Install the dimmer switch and defroster switch wiring harness to instrument panel reinforcement.

  61. Object Number: 904083  Size: SH
  62. Install the instument cluster.
  63. Install and tighten the screws.
  64. Tighten
    Tighten to 3 N·m (26 lbs in).


    Object Number: 904061  Size: SH
  65. Connect the electrical connectors to the instrument cluster.
  66. Install the CPA.

  67. Object Number: 904077  Size: SH
  68. Connect the electrical connector to the dimmer switch.
  69. Install the instrument cluster trim bezel. Push in at the clip locations.
  70. Install the push pin fasteners.

  71. Object Number: 904058  Size: SH
  72. Raise the steering column into position.
  73. Install and tighten the bolts.
  74. Tighten
    Tighten the 35 N·m (26 lbs ft).


    Object Number: 860465  Size: SH
  75. Route the hood release handle assembly through I/P and then install steering column filler panel.
  76. Tighten
    Tighten to 1.5 N·m (13 lbs in).


    Object Number: 904056  Size: SH
  77. Install the steering column filler panel and DLC.
  78. Install and tighten the screws.
  79. Tighten
    Tighten to 2.2 N·m (20 lbs in).


    Object Number: 903842  Size: SH
  80. Install and tighten bolts into H-bracket.
  81. Tighten
    Tighten bolts to 25 N·m (19 lbs in).


    Object Number: 903647  Size: SH
  82. Feed the instrument panel juction block through the H-bracket towards the rear of the car.
  83. Slide the IPJB on mounting pads to lock the tabs.
  84. Install and tighten IPJB screw.

  85. Object Number: 882260  Size: SH
  86. Connect the rear electrical connector to IPJB
  87. Tighten the screw.
  88. Tighten
    Tighten to 6.5 N·m (5 lbs ft).


    Object Number: 904052  Size: SH
  89. Install the wiring harness, ground wire and screw to H-bracket.
  90. Tighten the screw
  91. Tighten
    Tighten to 2.2 N·m (20 lbs in).


    Object Number: 904050  Size: SH
  92. Install the closeout seal.
  93. Important: Make sure the tabs engage closeout seal holes on both sides


    Object Number: 866646  Size: SH
  94. Install HVAC control.
  95. Install and tighten screws.
  96. Tighten
    Tighten to 2.5 N·m (2.2 lbs in).


    Object Number: 904136  Size: SH
  97. Install the temperature and mode cables over the pins

    Cable Identification:

    • Temperature cable- white
    • Mode cable-black
  98. Install cable housings into channel and push down to lock.

  99. Object Number: 904147  Size: SH
  100. Place HVAC control mode lever completely to the right-defroster position.

  101. Object Number: 860620  Size: MF
  102. Verify that mode cam is still in full counterclockwise position.
  103. Press mode cable housing firmly into retainer clip to lock.
  104. Move HVAC control mode lever through modes to verify proper installation.

  105. Object Number: 904147  Size: SH
  106. Place HVAC control temperature lever completely to the right - full hot.

  107. Object Number: 860623  Size: MF
  108. Verify that temperature cam is still in full counterclocwise position.
  109. Press temperature cable housing firmly into retainer clip to lock.
  110. Move HVAC control temperature lever from hot to cold to verify proper installation.

  111. Object Number: 1200114  Size: SH
  112. Connect the blower switch, A/C-Recirc and lighting electrical connectors.
  113. Important: Make sure wiring harnesses do not interfere with control lever movement.


    Object Number: 903535  Size: SH
  114. Connect the electrical connector and antenna to radio.

  115. Object Number: 903396  Size: SH
  116. Install the radio.
  117. Important: Make sure spring clips are seated in D-holes on both sides.

  118. Install and tighten the screws.
  119. Tighten
    Tighten to 2.5 N·m (22 lbs in).

  120. Connect the traction control/fog lamp/rear defog electrical connector, if equipped.
  121. Install the radio/HVAC control cover. Push in at clip locations.
  122. Install the push pins and lock.

  123. Object Number: 904105  Size: MH
  124. Install glove box and snap in at clip locations.
  125. Install and torqe screws.
  126. Tighten
    Tighten to 2.2 N·m (20 lbs in).

  127. Install glove box door stops.
  128. Adjust striker as necessary.

  129. Object Number: 904044  Size: SH
  130. Place the shifter in neutral.
  131. Lower the front of the console over shifter.
  132. Lower the rear of the console over parking brake lever onto rear mounting pad.
  133. Important: Make sure to place window/mirror and ashtray light connectors through openings into position.


    Object Number: 904043  Size: SH
  134. Move the console rearward.
  135. Install the cigarette lighter bulb through opening and rotate counterclockwise.
  136. Connect cigarette lighter electrical connector.
  137. Move the console forward into position.
  138. Important: Make sure that the upper tabs on front of the console engage sheet metal on lower I/P brace.

  139. Install and tighten the front console screws.
  140. Tighten
    Tighten to 1.2 N·m (11 lbs in).


    Object Number: 904041  Size: SH
  141. Install the left and right lower trim panel extensions by inserting hinges into console openings. Then rotate closed and push in at dual lock location.

  142. Object Number: 903985  Size: SH
  143. For vehicles without the console armrest:
  144. • Align the rear of console with pin on mounting pad.
    • Install and tighten screws.

    Tighten
    Tighten to 1.6 N·m (14 lb in).

    • Install the screw cover.

    Object Number: 904040  Size: SH
  145. Connect the window/mirror switch electrical connectors.
  146. Install the window/mirror switch by inserting front edge into opening. Then push the rear edge down into position.

  147. Object Number: 903990  Size: SH
  148. Insert the bulb through the opening until bulb socket is flush with cup holder. Push socket down to engage lock tab.
  149. Install the wiring harness to the cup holder.

  150. Object Number: 904074  Size: SH
  151. Install the cupholder by inserting through console opening and pushing straight down,

  152. Object Number: 904069  Size: SH
  153. Install the parking brake cover over lever.
  154. Install and tighten the screw.
  155. Notice: Do not overtighten screw or it may pull through cover.

    Tighten
    Tighten to 1.6 N·m (14 lbs in).


    Object Number: 877947  Size: SH
  156. Install the arm rest unit into the console, if equipped. Install and tighten the screws.
  157. Tighten
    Tighten to 1.6 N·m (14 lbs in).


    Object Number: 904034  Size: SH
  158. Install the right and left end cap assemblies.
  159. Install and tighten the screws.
  160. Tighten
    Tighten to 2.2 N·m (20 lbs in).


    Object Number: 905369  Size: SH
  161. Lubricate O-rings with R-12 Refrigerant oil (mineral) and install new O-rings on suction hose and liquid line.
  162. Insall the liquid line on the TXV.
  163. Tighten
    Tighten to 25 N·m (19 lbs ft).

  164. Install the suction hose on the TXV.
  165. Tighten
    Tighten to 25 N·m (19 lbs ft).


    Object Number: 903916  Size: SH
  166. Install the air cleaner housing cover and air induction hose.
  167. Fill and pressure test the cooling system.
  168. Evacuate, charge, and leak test A/C system. Perform A/C Performance Test.
  169. Connect the negative battery cable.
  170. Tighten
    Tighten to 17 N·m (151 lbs in).

  171. Set the clock to proper time if equipped.
  172. Enable the SIR system. (Refer to "Enabling the SIR System" in this service manual.)
  173. Reset the radio stations.

HVAC Module Assembly Replacement RHDD Bench Overhaul

Removal Procedure


    Object Number: 904525  Size: SH
  1. Remove the pipe cover screws and remove the pipe cover.

  2. Object Number: 860690  Size: SH
  3. Remove the pipe support plate screws and remove the support plate.

  4. Object Number: 860714  Size: SH

    Important: Be careful not to spill any residual coolant from the heater core when removing.

  5. Remove the heater core assembly from the module case.

  6. Object Number: 860681  Size: SH
  7. Remove the left module mounting bracket screws and remove the mounting bracket.

  8. Object Number: 860623  Size: MF
  9. Release the temperature cable from the retainer clip by pushing upward on the upper tab of the clip while pulling outward on the cable housing.

  10. Object Number: 860634  Size: MF
  11. Remove the temperature cable circular push-on retainer.
  12. Remove the temperature cable from the temperature cam.

  13. Object Number: 860675  Size: SH
  14. Use a small flat-bladed screwdriver to gently pry back the upper mix lever center tab and pull the upper mix lever off the shaft.

  15. Object Number: 860660  Size: SH
  16. Remove the temperature cam screw and washer and remove the cam.

  17. Object Number: 860664  Size: SH
  18. Use a small flat-bladed screwdriver to gently pry back the lower mix lever center tab and pull the lower lever off the shaft.

  19. Object Number: 860472  Size: MF
  20. Remove the mode cable from the retainer clip by pressing upward on the upper tab while pulling outward on the cable housing.

  21. Object Number: 860667  Size: SH
  22. Remove the mode cam screw and washer and pull the cam outward to disengage the mode cable eyelet.

  23. Object Number: 860671  Size: SH
  24. Remove the defroster door sub-lever screw and washer and remove the lever.

  25. Object Number: 860629  Size: SH
  26. Remove the heater door sub-lever screw and washer and remove the lever.

  27. Object Number: 860754  Size: SH
  28. Using a small flat-bladed screwdriver, gently pry back center tabs and pull the defroster lever, vent lever, and heater lever off of the shaft.

  29. Object Number: 860756  Size: SH
  30. Remove the lower case screws and remove the lower case.

  31. Object Number: 860725  Size: SH
  32. Use a razor blade to carefully cut the defroster and vent foam seals at the centerline.

  33. Object Number: 860759  Size: MH

    Important: One screw is located in the deep cavity to the right of the mix cam.

  34. Remove the case screws and lift straight up to separate the 2 halves of the case.

  35. Object Number: 904586  Size: SH
  36. Remove the evaporator core.

Installation Procedure


    Object Number: 904586  Size: SH

    Important: When installing a new evaporator core, 67 ml (2.25 oz) of PAG oil must be added to the core. Replace the evaporator pipe cover before installing core.

  1. Install the evaporator core into the right side or the HVAC module case.

  2. Object Number: 860759  Size: MH

    Important: 

       • Left case half cross support must interlock with right case half cross support.
       • When properly seated, module case tongue and groove seal will fit together snugly.

  3. Install the left half of the HVAC module case cover core and align the door shafts with the openings. Press the halves together until seated.

  4. Object Number: 860763  Size: SH
  5. Install the case screws. When installing center screw, use a piece of tape to hold the screw to the socket until the threads are started.

  6. Object Number: 860756  Size: SH

    Important: When properly seated, module case tongue and groove seal will fit together snugly.

  7. Install the lower case.
  8. Install the lower case screws.

  9. Object Number: 904527  Size: SH
  10. Install the heater core assembly. Press the core into the HVAC module case until the pipes contact the pipe cover attachment boss.

  11. Object Number: 904525  Size: SH
  12. Install the heater core pipe cover and screws.

  13. Object Number: 860754  Size: SH

    Important: All plastic cam levers have molded in part names and numbers. Refer to the cam illustration chart for part location information. All levers must be installed with the retention tang outward. Applying pressure to the opposite end of the door shaft may aid in seating the tang into the shaft.

  14. Install the defroster lever labeled DEF onto the defroster door shaft until the tang seats into the shaft notch.
  15. Install the vent lever labeled VENT 1301 onto the vent door shaft until the tang seats into the shaft notch.
  16. Install the heater lever labeled VENT 1401 onto the heater door shaft until the tang seats into the shaft notch.

  17. Object Number: 860629  Size: SH
  18. Position the metal heater sub-lever on the module boss with the pin set into the heater door lever.
  19. Install the heater sub-lever washer and screw.
  20. Rotate the heater sub-lever to verify the smooth operation of the levers and heater door.

  21. Object Number: 860671  Size: SH
  22. Position the metal defroster sub-lever on the module boss with the pins set into the defroster door lever.
  23. Install the defroster sub-lever washer and screw.
  24. Rotate the defroster sub-lever to verify the smooth operation of the lever and defroster door.

  25. Object Number: 860667  Size: SH
  26. Install the mode cam on the center boss. Align the defroster sub-lever, vent lever, and heater sub-lever so that each pin is the proper mode cam track.
  27. Install the mode cam washer and screw.
  28. Rotate the mode cam to verify the smooth operation of all doors, levers, and sub-levers.

  29. Object Number: 860599  Size: SH

    Important: Install the mode cable with the wire eyelet wrap as shown.

  30. Install the mode cable.

  31. Object Number: 860615  Size: MF

    Important: Do not install the mode cable housing into the retainer at this time.

  32. Install the mode cable eyelet between the mode cam pin and module case and rotate onto the mode cam pin.

  33. Object Number: 860664  Size: SH
  34. Install the lever labeled HOT onto the lower mix cam door shaft until the tang seats into the shaft notch.

  35. Object Number: 860660  Size: SH
  36. Install the temperature cam ensuring that the lower mix lever pin is in the cam lower track.
  37. Install the temperature cam washer and screw.

  38. Object Number: 860675  Size: SH
  39. Position the lever labeled COOL onto the upper mix cam door shaft so that the pin will be in the upper temperature cam track when seated. Press down until the tang seats into the shaft notch.
  40. Rotate the temperature cam to verify the smooth operation of both doors.

  41. Object Number: 860488  Size: SH

    Important: Install the temperature cable with the wire eyelet wrap as shown.

  42. Install the temperature cable.

  43. Object Number: 860634  Size: MF

    Important: Do not install the temperature cable housing into the retainer at this time.

  44. Install the temperature cable on the temperature cam pin and install the circular push-on retainer.

  45. Object Number: 860681  Size: SH
  46. Install the left module mounting bracket and screws.

  47. Object Number: 860690  Size: SH
  48. Install the pipe support plate screws.

  49. Object Number: 860736  Size: SH

    Important: The heater core pipe seal consists of 2 seals installed back-to-back.

  50. Install the evaporator block seal, heater core pipe seal, and drain tube seal.