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.

Install the spacer, if applicable, onto the rear of the crankshaft.

Fig 1: Installing Spacer Onto Rear Of Crankshaft
Courtesy of GENERAL MOTORS CORP.
Install the flywheel and bolts to the crankshaft.
Important: Longer flywheel bolts must be used on applications using a flywheel spacer.
Apply threadlock GM P/N 12345382, (Canadian P/N 10953489) or equivalent to the threads of the flywheel bolts.

Fig 2: Installing Flywheel & Bolts
Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Tighten the flywheel bolts.
Tighten
1. 4.1. Tighten the bolts a first pass in sequence to 20 N.m (15 lb ft).
2. 4.2. Tighten the bolts a second pass in sequence to 50 N.m (37 lb ft).
3. 4.3. Tighten the bolts a final pass in sequence to 100 N.m (74 lb ft).
Install the automatic transmission. Refer to TRANSMISSION in Automatic Transmission - 4L60-E or TRANSMISSION in Automatic Transmission - 4L80-E.

Fig 3: Tightening Bolts In Sequence
Courtesy of GENERAL MOTORS CORP.