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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 601 (Engine Cooling System) >> Repair Instructions >> Coolant Heater Replacement (3.8L) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. 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. Raise and support the vehicle.
  3. Disconnect the coolant heater cord from the coolant heater.
  4. Loosen the bolt at the coolant heater but DO NOT remove the coolant heater bolt.
  5. Remove the coolant heater.
  6. Remove and clean any burrs, compound, paint, or rough spots from the core plug hole.
    Fig 1: Coolant Heater
    G01764853Courtesy of GENERAL MOTORS CORP.
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