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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Mechanical - 6.6L - On Vehicle Repair Instructions) >> On-Vehicle Repair Instructions >> Crankshaft Reluctor and Oil Pump Drive Gear Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the engine front cover. Refer to Engine Front Cover Replacement .
  2. Remove the upper oil pan. Refer to Oil Pan Replacement - Upper .
    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.
  3. While holding the secondary oil pump shaft with a hex driver, remove the oil pump driven gear nut.
  4. Remove the oil pump driven gear.
    Fig 1: View Of Oil Pump Driven Gear & Nut
    GM738905Courtesy of GENERAL MOTORS CORP.
  5. Remove the oil pump drive gear and crankshaft sensor reluctor. Do not damage the crankshaft reluctor teeth.
    Fig 2: View Of Oil Pump Drive Gear
    GM738904Courtesy of GENERAL MOTORS CORP.
    6. IMPORTANT: Do not remove the reluctor from the oil pump drive gear unless replacing the reluctor or the oil pump drive gear. The reluctor is timed to the gear and once removed the correct timing will be lost.
    Fig 3: View Of Crankshaft Reluctor & Oil Pump Drive Gear Bolts
    GM739296Courtesy of GENERAL MOTORS CORP.
  6. Remove the crankshaft reluctor to oil pump drive gear bolts.
  7. Inspect the crankshaft reluctor for damage, bent teeth, being bent or warped.
  8. Inspect the oil pump drive gear for damaged or worn teeth.
  9. Inspect the oil pump drive gear crankshaft pin for wear.
  10. Inspect the groove of the crankshaft pin in the oil pump drive gear for wear.
  11. Replace any parts that are damaged or worn.
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