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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 left fender wheelhouse inner panel. Refer to Wheelhouse Panel Replacement in Body Front End.
  2. Drain the engine coolant and the engine block. Refer to Draining and Filling Cooling System (without HP2) .
  3. Remove the thermostat housing crossover. Refer to Thermostat Housing Crossover Replacement (6.6L (LB7) Engine) .
  4. Remove the fan clutch. Refer to Fan Clutch Replacement .
  5. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement in Engine Mechanical - 6.6 L.
  6. Remove the oil cooler inlet pipe to water pump nuts.
    7. Fig 1: View Of Water Pump Inlet Pipe Nuts
    GM660519Courtesy of GENERAL MOTORS CORP.
  7. Remove the engine wiring harness retainer from the inner stud.
  8. Remove the water pump bolts. Note the location of the bolts. The bolts are three different lengths.
  9. Remove the water pump.
  10. Remove the water pump outlet pipe gasket.
  11. If required, clean and inspect the water pump. Refer to Water Pump Cleaning and Inspection in Engine Mechanical - 6.6L.
    12. Fig 2: View Of Water Pump & O-Ring (6.6L (LB7))
    GM660521Courtesy of GENERAL MOTORS CORP.
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