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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 >> Camshaft Replacement >> Installation Procedure

Installation Procedure

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  1. Install the camshaft thrust plate to the camshaft.
    Fig 1: View Of Camshaft, Camshaft Gear & Camshaft Thrust Plate
    GM660540Courtesy of GENERAL MOTORS CORP.
  2. Install the camshaft driven gear.
  3. Install a NEW camshaft driven gear bolt.

    Leave the bolt finger tight.

  4. Install the camshaft into the cylinder block, align the camshaft gear to the crankshaft gear as shown.
    Fig 2: Aligning Camshaft And Crankshaft Gears
    GM663813Courtesy of GENERAL MOTORS CORP.
  5. Apply threadlock GM P/N 12345493 (Canadian P/N 10953488), or equivalent to the threads of the camshaft thrust plate bolts.
    NOTE: Refer to Fastener Notice .
  6. Install the camshaft thrust plate bolts.
    Fig 3: View Of Camshaft Thrust Plate Bolts
    GM738902Courtesy of GENERAL MOTORS CORP.

    Tighten:  Tighten the bolts to 22 N.m (16 lb ft).

  7. Install the camshaft reluctor to the camshaft gear.
    Fig 4: View Of Camshaft Reluctor & Bolts
    GM739316Courtesy of GENERAL MOTORS CORP.
  8. Install the camshaft reluctor bolts.

    Tighten:  Tighten the bolts in a cross-bolt pattern to 9 N.m (80 lb in).

  9. Reinstall J 44643  in the starter opening, if removed. See Special Tools .
    Fig 5: Locking Flywheel Using J 44643
    GM660308Courtesy of GENERAL MOTORS CORP.
  10. Install a NEW camshaft gear bolt.

    Tighten:  Tighten the bolt to 234 N.m (173 lb ft).

  11. Using J 26900-12  (1) and J 26900-13  (2) measure the camshaft end play. See Special Tools .
    Fig 6: Measuring Camshaft End Play Using J 26900-12 & J 26900-13
    GM738903Courtesy of GENERAL MOTORS CORP.
    • The production value is 0.050-0.114 mm (0.002-0.0045 in) and service limit is 0.20 mm (0.008 in).
    • Replace the camshaft gear or the camshaft thrust plate if measured value exceeds the service limit.
    12. IMPORTANT: Do not damage the teeth on the crankshaft reluctor.
    Fig 7: View Of Oil Pump Drive Gear
    GM738904Courtesy of GENERAL MOTORS CORP.
  12. Install the oil pump drive gear and reluctor to the crankshaft.
  13. Install the oil pump driven gear.
    Fig 8: View Of Oil Pump Driven Gear & Nut
    GM738905Courtesy of GENERAL MOTORS CORP.
  14. Install the oil pump driven gear nut.

    Tighten:  Tighten the nut to 100 N.m (74 lb ft).

  15. Install the engine front cover. Refer to Engine Front Cover Replacement .
  16. Install the starter. Refer to Starter Motor Replacement (6.6L (LLY) Engine) .
  17. Install the A/C condenser. Refer to Condenser Replacement in Heating, Ventilation, and Air Conditioning.
  18. Install the charged air cooler. Refer to Charged Air Cooler Replacement .
  19. Install the valve lifters. Refer to Valve Lifter Replacement .
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