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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1620 (Engine Cooling System) >> Repair Instructions >> Coolant Heater Replacement (6.6L Engine) >> 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 cooling system. Refer to Draining and Filling Cooling System .
  2. Remove the right front tire and wheel. Refer to TIRE AND WHEEL REMOVAL AND INSTALLATION .
  3. Remove the right engine mount .
  4. Disconnect the engine coolant heater cord.
    Fig 1: Disconnect Engine Coolant Heater Cord
    G02109275Courtesy of GENERAL MOTORS CORP.
  5. Loosen the coolant heater bolt.
  6. Remove the engine coolant heater from the engine block.
  7. Do not score the machined surface of the hole.
  8. Grasp the plug with pliers.
  9. Pull the plug from the engine block.
  10. Clean the core plug hole in order to remove the following substances:
    • Burrs
    • Compound
    • Paint
    • Rough spots
    Fig 2: Remove Engine Coolant Heater
    G02109276Courtesy of GENERAL MOTORS CORP.
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