Tools Required

Important: It may be necessary to remove the chamfer from the edge of an 18 mm socket to obtain a full socket engagement on the thin headed flywheel bolts.

The flywheel can not be rotated to balance the flywheel to the engine because it can only be installed on the vehicle one way.
1. Remove the transmission assembly. Refer to Transmission Replacement in Automatic Transaxle 4T40E/4T45E, or Transmission Replacement in Manual Transmission-M86/M94 Getrag.
2. Remove the right engine splash shield. Refer to Engine Splash Shield Replacement in Body Front End.

Important: Mark the relationship of the clutch cover assembly to the flywheel in order to assure proper balance during reassembly.

3. For vehicle equipped with a manual transmission, install the clutch and pressure plate and clutch cover assembly. Refer to Clutch Pressure and Driven Plate Replacement in Clutch.



4. Remove the flywheel attaching bolt while using J 38122-A to prevent crankshaft rotation.
5. Remove the flywheel and retainer.
6. The thread adhesive must be thoroughly removed from the flywheel.

1. Install the new bolts or apply adhesive/Sealant compound GM P/N 123454493 or equivalent to all flywheel to crankshaft bolts that are being re-used.
2. Carefully follow the instructions included with the thread locking compound to ensure proper bolt retention.



3. Install the flywheel and the attaching bolts.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install theJ 38122-A .

Tighten

•	Tighten bolts to 30 N·m (22 lb ft).

•	Then rotate the bolts 45 degrees using J 36660-A .

5. For vehicle equipped with a manual transmission, install the clutch and pressure plate and clutch cover assembly. Refer to Clutch Pressure and Driven Plate Replacement in Clutch.
6. Install the transmission assembly. Remove the transmission assembly. Refer to Transmission Replacement in Automatic Transaxle 4T40E/4T45E, or Transmission Replacement in Manual Transmission-M86/M94 Getrag.
7. Install the right engine splash shield. Refer to Engine Splash Shield Replacement in Body Front End.