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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 >> Thermostat Bypass Pipes 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. Remove the thermostat housing. Refer to Thermostat Housing Crossover Replacement (6.6L Engine) .
  2. Remove the thermostat bypass pipe and O-ring seal from the thermostat housing.
  3. Remove and discard the O-ring seal.
  4. Clean the sealing surfaces of the bypass pipe.
  5. Clean the water pump and the thermostat housing crossover sealing surfaces.
    Fig 1: Remove Thermostat Bypass Pipe & O-Ring Seal
    G02109192Courtesy of GENERAL MOTORS CORP.
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