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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 40 (Engine Mechanical - 6.6L - Off Vehicle Repair Instructions (1 Of 3)) >> Off-Vehicle Repair Instructions (Part 1) >> Oil Pump Removal

Oil Pump Removal

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    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.
    Fig 1: Removing/Installing Secondary Oil Pump Driven Gear Nut While Holding Oil Pump Shaft
    GM776631Courtesy of GENERAL MOTORS CORP.
  1. While holding the secondary oil pump shaft with a hex driver, remove the oil pump driven gear nut.
  2. Remove the oil pump driven gear.
    Fig 2: View Of Oil Pump Driven Gear
    GM660532Courtesy of GENERAL MOTORS CORP.
    3. IMPORTANT: Do not damage the crankshaft sensor reluctor teeth.
    Fig 3: View Of Oil Pump Drive Gear
    GM660339Courtesy of GENERAL MOTORS CORP.
  3. Remove the oil pump drive gear and crank sensor reluctor assembly.
  4. Remove the oil pump bolts.
  5. Remove the oil pump.
    Fig 4: View Of Oil Pump, Bolts & O-Ring
    GM660533Courtesy of GENERAL MOTORS CORP.
  6. Remove the O-ring and discard.
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