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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1072 (Engine Mechanical - 6.6L (2 Of 5)) >> On-Vehicle Repair Instructions >> Oil Pump Removal

Oil Pump Removal

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Removing/Installing Secondary Oil Pump Driven Gear Nut While Holding Oil Pump Shaft
    GM776631Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not use an impact driver to remove or install the oil pump driven gear nut. Use of an impact driver may shear the oil pump drive gear pin in the crankshaft.
    IMPORTANT: Look for an "L" on the end of the oil pump shaft. If there is an "L" present, the nut and shaft have left hand threads. Service the nut accordingly.
  1. While holding the secondary oil pump shaft with a hex driver, remove the oil pump driven gear nut.
    2. Fig 2: View Of Oil Pump Driven Gear
    GM660532Courtesy of GENERAL MOTORS CORP.
  2. Remove the oil pump driven gear.
    3. Fig 3: View Of Oil Pump Drive Gear
    GM660339Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not damage the crankshaft sensor reluctor teeth.
  3. Remove the oil pump drive gear and crank sensor reluctor assembly.
    4. Fig 4: View Of Oil Pump, Bolts & O-Ring
    GM660533Courtesy of GENERAL MOTORS CORP.
  4. Remove the oil pump bolts.
  5. Remove the oil pump.
  6. Remove the O-ring and discard.
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