GM Service Manual Online
For 1990-2009 cars only

Cause

Correction

Review the system operation in order to familiarize yourself with the system functions. As required, disable the auto-stop function prior to repair. Refer to Hybrid Modes of Operation Description.

Low oil pressure

  1. Perform an oil pressure test. Refer to Oil Pressure Diagnosis and Testing.
  2. Repair or replace components, as required.

Detonation or spark knock

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

Loose flex plate-to-dampener bolts

  1. Inspect the dampener bolts and flex plate.
  2. Repair, as required.

Cracked flex plate - automatic transmission

  1. Inspect the flex plate bolts and flex plate.
  2. 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