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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 >> Removal Procedure

Removal 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. Drain the engine coolant. Refer to Draining and Filling Cooling System (with HP2) or Draining and Filling Cooling System (without HP2) in Engine Cooling.
  2. If equipped remove the auxiliary battery. Refer to Battery Replacement - Auxiliary in Engine Electrical.
  3. Reposition the inlet heater hose clamp from the heater core.
  4. Remove the inlet heater hose from the heater core.
  5. Reposition the outlet heater hose clamp from the heater core.
  6. Remove the outlet heater hose from the heater core.
  7. Remove the I/P carrier. Refer to Instrument Panel (I/P) Carrier Replacement in Instrument Panel, Gages and Console.
  8. Remove the heater/vent module drain hose.
    9. Fig 1: Heater/Vent Module Assembly Wiring Harness Routing
    GM499156Courtesy of GENERAL MOTORS CORP.
  9. Disconnect the electrical harnesses and the ground connections.
    10. Fig 2: Heater/Vent Module Assembly
    GM363009Courtesy of GENERAL MOTORS CORP.
  10. Remove the heater/vent module mounting nuts and the screws.
  11. Remove the heater/vent module assembly from the vehicle.
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