GM Service Manual Online
For 1990-2009 cars only

Cause

Correction

Low oil pressure

    • Perform an oil pressure test. Refer to Oil Pressure Diagnosis and Testing .
    • Repair or replace as required.

Detonation or spark knock

Verify the correct operation of the ignition system. Refer to Detonation/Spark Knock.

Loose torque converter bolts

    • Inspect the torque converter bolts and flywheel.
    • Repair as required.

Cracked flywheel (automatic transmission)

    • Inspect the flywheel bolts and flywheel.
    • Repair as required.

Excessive connecting rod bearing clearance

Inspect the following components, and repair as required:

    • The connecting rod bearings
    • The connecting rods
    • The crankshaft

Excessive crankshaft bearing clearance

Inspect the following components, and repair as required:

    • The crankshaft bearings
    • The crankshaft journals
    • The cylinder block crankshaft bearing bore