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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1380 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> HVAC Module Assembly Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: HVAC Module Assembly, Rear Heater Ducts And Nuts
    GM834531Courtesy of GENERAL MOTORS CORP.
  1. Install the HVAC module assembly (1) to the vehicle.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the four nuts (2).

    Tighten:  Tighten the nuts (2) to 10 N.m (89 lb in).

  3. Connect the rear heater ducts (3) to the HVAC module assembly (1).
  4. Connect the blower motor electrical connector.
  5. Install the instrument panel reinforcement. Refer to Instrument Panel (I/P) Carrier Support Replacement in Instrument Panel, Gages, and Console.
  6. Install the instrument panel assembly. Refer to Instrument Panel (I/P) Trim Panel Replacement - Lower and Trim Pad Replacement - Instrument Panel (I/P) Upper in Instrument Panel, Gages, and Console.
  7. Install new O-rings lubricated with mineral base 525 viscosity refrigerant oil.
    8. Fig 2: Inlet Tube, Compressor, Suction Line, Bolts And Nuts
    GM833674Courtesy of GENERAL MOTORS CORP.
  8. Install the evaporator inlet (4) and outlet (3) tubes to the evaporator.
    9. Fig 3: Heater Core And Hoses
    GM244231Courtesy of GENERAL MOTORS CORP.
  9. Install the heater hoses (2,3) to the heater core.
  10. Fill the cooling system. Refer to Draining and Filling Cooling System .
  11. Evacuate and Recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
  12. Connect the negative battery cable.

    Tighten:  Tighten the negative battery cable to 15 N.m (11 lb ft).

  13. Operate the A/C system and test for refrigerant leaks. Refer to Leak Testing .
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