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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1401 (Engine Mechanical - 6.6L (2 Of 5)) >> Repair Instructions - On Vehicle >> Engine Flywheel Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: When removing, handling or installing this component wear protective gloves. The sharp edges on the component may be very sharp and may cause injury.
    Fig 1: View Of Flywheel & Washer (Automatic)
    GM1334818Courtesy of GENERAL MOTORS CORP.
    NOTE: When installing the flywheel, ensure that the tapered side of the teeth are facing the starter.
  1. Install the flywheel.
  2. Install the flywheel washer with the beveled side facing the engine.
    CAUTION: Refer to Fastener Caution .
    3. CAUTION: This component uses bolts with a preapplied molybdenum disulfide coating for thread lubrication. Do not remove the coating or use any additional lubricant. Improperly lubricated threads will adversely affect the bolt torque and clamp load. Improper bolt torque and clamp load can lead to engine damage.
  3. Install NEW flywheel bolts.
    4. Fig 2: Identifying Flywheel Bolt Tightening Sequence
    GM663928Courtesy of GENERAL MOTORS CORP.
  4. Tighten the flywheel bolts in the proper sequence.

    Tighten: 

    1. Tighten the bolts a first pass to 79 N.m (58 lb ft).
    2. Tighten the bolts a second pass to 60 degrees using J 45059  .
    3. Tighten the bolts a final pass an additional 60 degrees using J 45059  .

    5. Fig 3: Locking Flywheel Using J 44643
    GM660308Courtesy of GENERAL MOTORS CORP.
  5. Remove J 44643  from the flywheel. See Special Tools .
  6. Install the transmission. Refer to Transmission Replacement for the 4L60-E/4L65-E/4L70-E transmission, Transmission Replacement for the 4L50/4L80/4L90 transmission, or Transmission Replacement for the Allison transmission.
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