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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 648 (Engine Cooling System) >> Repair Instructions >> Coolant Heater Replacement (4.8L, 5.3L & 6.0L Engines) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 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 & Filling Cooling System .
  2. Raise and suitably support the vehicle.
  3. Disconnect the coolant heater electrical connector (2).
    Fig 1: Coolant Heater Electrical Connector
    G01658212Courtesy of GENERAL MOTORS CORP.

    Important:  Do not score the surface of the engine block hole when removing the coolant heater.

  4. Remove the coolant heater from the engine block.
    5. Fig 2: Coolant Heater
    G01658213Courtesy of GENERAL MOTORS CORP.
  5. Remove any burrs, sealer, paint or other rough spots.
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