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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1008 (Heating, Ventilation And Air Conditioning - Gas) >> Repair Instructions >> Heater/Vent Module Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the heater/vent module assembly to the vehicle.
    Fig 1: Heater/Vent Module Assembly
    GM363009Courtesy of GENERAL MOTORS CORP.
  2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the heater/vent module mounting nuts.

    Tighten:  Tighten the nuts to 9 N.m (80 lb in).

  4. Install the heater/vent module mounting screws.

    Tighten:  Tighten the screws to 4 N.m (35 lb in).

  5. Fig 2: Heater/Vent Module Assembly Wiring Harness Routing
    GM499156Courtesy of GENERAL MOTORS CORP.
  6. Connect the electrical harnesses and the ground connections.
  7. Install the heater/vent module drain hose.
  8. Install the I/P carrier. Refer to Instrument Panel (I/P) Carrier Replacement in Instrument Panel, Gages and Console.
  9. Install the outlet heater hose to the heater core.
  10. Reposition the outlet heater hose clamp to the heater core.
  11. Install the inlet heater hose to the heater core.
  12. Reposition the inlet heater hose clamp to the heater core.
  13. Fill the cooling system. Refer to Draining and Filling Cooling System (with HP2) or Draining and Filling Cooling System (without HP2) in Engine Cooling.