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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 412 (Heating, Ventilation And Air Conditioning - Gas) >> Repair Instructions >> Heater Core Replacement (Heat Only) >> 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. Remove the heater/vent module. Refer to Heater/Vent Module Replacement .
  2. Remove the heater core cover screws.
    3. Fig 1: Heater Core Cover (Heat Only)
    GM363771Courtesy of GENERAL MOTORS CORP.
  3. Remove the heater core cover.
    4. Fig 2: Removing Heater Core (Heat Only)
    GM363772Courtesy of GENERAL MOTORS CORP.
  4. Remove the heater core.
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