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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 977 (Engine Cooling System) >> Repair Instructions >> Thermostat Bypass Pipes Replacement (6.6L (LB7) Engine) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 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 (LB7) 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.
    6. Fig 1: View Of Thermostat Housing & Bypass Pipes
    GM699331Courtesy of GENERAL MOTORS CORP.
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