GM Service Manual Online
For 1990-2009 cars only

Cause

Correction

Low oil pressure

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

Detonation or spark knock

Verify the correct operation of the ignition system. Refer to Symptoms - Engine Controls.

Loose torque converter bolts

    â€¢ Inspect the torque converter bolts and flywheel.
    â€¢ Repair as required.

Cracked flywheel, automatic transmission

    â€¢ Inspect the flywheel bolts and flywheel.
    â€¢ Repair as required.

Excessive connecting rod bearing clearance

Inspect the following components, and repair as required:

    â€¢ The connecting rod bearings
    â€¢ The connecting rods
    â€¢ The crankshaft

Excessive crankshaft bearing clearance

Inspect the following components, and repair as required:

    â€¢ The crankshaft bearings
    â€¢ The crankshaft journals
    â€¢ The cylinder block crankshaft bearing bore