GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Vivant 🢒 HVAC 🢒 Heating, Ventilation, and Air Conditioning 🢒 HVAC Module Assembly Replacement

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1279785 Size: SH
  1. Disconnect the negative battery cable.
  2. Drain the cooling system. Refer to Cooling System Draining and Filling .
  3. Remove the inlet and outlet heater hoses from the heater core.
  4. Recover the refrigerant if an air conditioning (A/C) system is equipped. Refer to Refrigerant Recovery and Recharging .
  5. Remove the high pressure pipe and suction hose on the cowl, if an A/C system is equipped.
  6. Remove the upper 4 bolts that secures the heater/air distributor case assembly.

    7. Object Number: 1279786 Size: SH
  7. Lift the vehicle and remove the lower 2 bolts that secure the heater/air distributor case assembly.

    8. Object Number: 1279788 Size: SH
  8. Remove the instrument panel carrier assembly. Refer to Instrument Panel Assembly Replacement .
  9. Remove the nut (1) that secures the heat/air distribution case.
  10. Remove the heater/air distribution case assembly.

Installation Procedure

    Object Number: 1279788 Size: SH
  1. Install the heater/air distribution case assembly.

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

  2. Install the nut (1) that secures heat/air distribution case.

    3. Tighten
    Tighten the nut to 4 N·m (35 lb in).

  3. Install the instrument panel carrier assembly. Refer to Instrument Panel Assembly Replacement .

    4. Object Number: 1279786 Size: SH
  4. Lift the vehicle and install the lower 2 bolts that secure the heater/air distributor case assembly.

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


    Object Number: 1279785 Size: SH
  5. Install the upper 4 bolts that secure the heater/air distributor case assembly.

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

  6. Install the high pressure pipe and suction hose on the cowl, if an A/C system is equipped.
  7. Install the inlet and outlet heater hoses to the heater core.
  8. Refill the cooling system. Refer to Cooling System Draining and Filling .
  9. Recharge the refrigerant if an A/C system is equipped. Refer to Refrigerant Recovery and Recharging .
  10. Connect the negative battery cable.