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Installation 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. Install a NEW O-ring seal onto the bypass pipe.
  2. Install a NEW O-ring seal to the water pump.
    3. Fig 1: View Of Water Pump Inlet Pipe
    GM1335432Courtesy of GENERAL MOTORS CORP.
  3. Lubricate the O-ring seals with clean engine coolant.
  4. Install the bypass pipe into the thermostat housing.
  5. Install the thermostat housing. Refer to Thermostat Housing Crossover Replacement (6.6L (LLY) Engine) .
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