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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1498 (Engine Cooling System) >> Repair Instructions >> Thermostat Replacement (5.3L Engine) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.
  1. Remove the radiator outlet hose. Refer to RADIATOR HOSE REPLACEMENT - OUTLET (BODY VIN CODE 3)   or RADIATOR HOSE REPLACEMENT - OUTLET (BODY VIN CODE 6 LM4)   or RADIATOR HOSE REPLACEMENT - OUTLET (BODY VIN CODE 6 LL8)   .
  2. Remove the water pump inlet bolts.
  3. Remove the water pump inlet and thermostat from the water pump.
    Fig 1: Thermostat Location - 5.3L Engine
    G02129805Courtesy of GENERAL MOTORS CORP.
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