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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1602 (Heating, Ventilation And Air Conditioning) >> Repair Instructions >> Heater/Vent Module Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 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 .
  2. Reposition the inlet heater hose clamp from the heater core.
  3. Remove the inlet heater hose from the heater core.
  4. Reposition the outlet heater hose clamp from the heater core.
  5. Remove the outlet heater hose from the heater core.
  6. Remove the I/P carrier. Refer to INSTRUMENT PANEL (I/P) CARRIER REPLACEMENT .
  7. Remove the heater/vent module drain hose.
  8. Disconnect the electrical harnesses and the ground connections.
    Fig 1: Disconnect Electrical Harnesses & Ground Connections
    G01479200Courtesy of GENERAL MOTORS CORP.
  9. Remove the heater/vent module mounting nuts and the screws.
  10. Remove the heater/vent module assembly from the vehicle.
    Fig 2: Remove Heater/Vent Module Assembly From Vehicle
    G01479201Courtesy of GENERAL MOTORS CORP.
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