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Installation Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: HVAC Module Assembly
    GM735960Courtesy of GENERAL MOTORS CORP.
  1. If replacing the HVAC module assembly (8), transfer the components from the old HVAC module assembly as necessary.
  2. Install the HVAC module assembly (8).
  3. Connect all of the electrical connectors to the HVAC module assembly.
    4. Fig 2: Evaporator Tube At Evaporator
    GM735916Courtesy of GENERAL MOTORS CORP.
  4. Connect the heater hoses to the heater core.
  5. Connect the evaporator tube (4) to the evaporator (1).
  6. Install the accumulator (6) to the evaporator (1).
    7. NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  7. Tighten the accumulator retaining nut.

    Tighten:  Tighten the nut to 4.5 N.m (40 lb in).

  8. Install the I/P carrier. Refer to INSTRUMENT PANEL (I/P) CARRIER REPLACEMENT in Instrument Panel, Gages and Console.
  9. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  10. Leak test the fittings of the components using the J 39400-A  Halogen Leak Detector. See Special Tools and Equipment .
  11. Refill the engine coolant. Refer to DRAINING AND FILLING COOLING SYSTEM in Engine Cooling.
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