Tools Required

1. Remove the transmission assembly. Refer to Two-Wheel-Drive Transmission Replacement or Four-Wheel-Drive Transmission Replacement in Manual Transmission or Two-Wheel-Drive Transmission Replacement or Four-Wheel-Drive Transmission Replacement in Automatic Transmission.
2. Remove the clutch and pressure plate on manual transmission equipped vehicles. Refer to Clutch Assembly Replacement in Clutch.
3. Inspect the ring gear (2). Replace the flywheel if the ring gear is damaged, cracked or worn.
4. Inspect the clutch disc contact surface on manual transmission equipped vehicles. Replace the flywheel if the surface is damaged or excessively worn.



5. Measure the flywheel face runout using a J 8001 with a J 26900-13 . Replace the flywheel if the runout exceeds specifications.

Flywheel Runout
0.2 mm (0.0078 in)




6. Mark the flywheel-to-engine position.
7. Lock the flywheel (1) in place with the J 35271 .



8. Remove the 8 flywheel retaining bolts.
9. Remove the flywheel from the crankshaft.
10. Inspect the clutch pilot bushing. Replace if necessary. Refer to Clutch Pilot Bearing Replacement in Clutch.
11. Clean the grease and dirt from the flywheel outer surfaces using a suitable solvent.

1. Align the flywheel-to-engine marks and install the flywheel (3) to the crankshaft.

Notice: Apply the proper amount of the sealant to the fastener when assembling this component. Excessive use of the sealant can prohibit the component from being assembled properly or allow the fastener to loosen. A component or fastener that is not assembled properly can loosen or fall off leading to extensive engine damage.

2. Apply GM P/N 12345493, or the equivalent, to the flywheel retaining bolt threads.




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.

3. Install the flywheel retaining bolts to the crankshaft. Use the J 35271 to lock the flywheel.

Tighten
Cross tighten the 8 flywheel retaining bolts to 70 N·m (51 lb ft).

4. Install the clutch and pressure plate on manual transmission equipped vehicles. Refer to Clutch Assembly Replacement in Clutch.
5. Install the transmission assembly. Refer to Two-Wheel-Drive Transmission Replacement or Four-Wheel-Drive Transmission Replacement in Manual Transmission or Two-Wheel-Drive Transmission Replacement or Four-Wheel-Drive Transmission Replacement in Automatic Transmission.