Installation Procedure

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IMPORTANT:

The flywheel does not use a locating pin for alignment and will not initially seat against the crankshaft flange or spacer (if applicable), but will be pulled onto the crankshaft by the engine flywheel bolts. This procedure requires a three stage tightening process.
Certain applications (6.0L) require a spacer and longer bolts for proper flywheel position.

Fig 1: View Of Spacer & Crankshaft Rear

Courtesy of GENERAL MOTORS CORP.

Install the spacer (if applicable) onto the rear of the crankshaft.

Fig 2: View Of Engine Flywheel & Bolt

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Longer flywheel bolts must be used on applications using a flywheel spacer.

Install the automatic transmission engine flywheel to the crankshaft.
Apply threadlock GM P/N 12345382, Canada P/N 10953489, or equivalent to the threads of the flywheel bolts.

Fig 3: Identifying Flywheel Bolt Tightening Sequence

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.

Install the engine flywheel bolts.
Tighten:
1. Tighten the engine flywheel bolts a first pass in sequence to 20 N.m (15 lb ft).
2. Tighten the engine flywheel bolts a second pass in sequence to 50 N.m (37 lb ft).
3. Tighten the engine flywheel bolts a final pass in sequence to 100 N.m (74 lb ft).
Install the automatic transmission. For 4L60-E, refer to TRANSMISSION or for 4L80-E, refer to TRANSMISSION .