GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 GMC C Sierra - 2WD 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Intake Air Heater Replacement

Removal Procedure
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  3. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .

    4. Object Number: 1602057 Size: SH
  4. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  5. Remove the electrical harness bolts.
  6. Reposition the harness clip from the intake manifold tube, as needed.

    7. Object Number: 1653262 Size: SH
  7. Remove the engine harness power lead nut (2) from the intake air heater stud.
  8. Remove the engine harness power lead (1) from the intake air heater stud.

    9. Object Number: 1602059 Size: SH
  9. Remove the air inlet tube to intake manifold tube bolt and nut.
  10. Disconnect the intake air heater electrical connector.
  11. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.
  12. Remove the engine harness clip from the air inlet tube.
  13. Disconnect the exhaust gas recirculation (EGR) valve motor harness connector.
  14. Remove the 4 screws that secure the EGR valve motor to the EGR valve.
  15. Remove the EGR valve motor from the EGR valve.
  16. Remove the air inlet tube.

    17. Object Number: 1602066 Size: SH
  17. Remove the intake air heater nuts and bolts.
  18. Separate the air inlet tube from the intake air heater.
  19. Remove the air inlet heater (IAH) and discard the IAH gasket.

Installation Procedure
  1. Install the IAH using a NEW gasket.

    2. Object Number: 1602066 Size: SH
  2. Install the air inlet tubes to the intake air heater.

    3. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the intake air heater nuts and bolts.

    4. Tighten
    Tighten the bolts to 20 N·m (15 lb ft).


    Object Number: 1602059 Size: SH
  4. Install the air inlet tube to intake manifold tube bolt and nut.

    5. Tighten
    Tighten the bolt/nut to 10 N·m (89 lb in).

  5. Install the EGR motor to the EGR valve.
  6. Install the EGR bolts.

    7. Tighten
    Tighten the bolts to 20 N·m (15 lb ft).

  7. Connect the EGR valve motor harness connector.
  8. Connect the intake air heater electrical connector.
  9. Connect the MAP sensor electrical connector.
  10. Install the engine harness clip to the air inlet tube.

    11. Object Number: 1653262 Size: SH
  11. Install the engine harness power lead (1) to the intake air heater stud.
  12. Install the engine harness power lead nut (2) to the intake air heater stud.

    13. Tighten
    Tighten the nut to 10 N·m (89 lb in).


    Object Number: 1602057 Size: SH
  13. Install the electrical harness bolts.

    14. Tighten
    Tighten the bolts to 4 N·m (35 lb in).

  14. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  15. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  16. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  17. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .