GM Service Manual Online
For 1990-2009 cars only

Diagnostic Instructions

    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Circuit/System Testing

  1. Remove the flywheel inspection cover.
  2. Inspect the flywheel for the following:
  3. • Loose flywheel bolts
    • Chipped gear teeth
    • Missing gear teeth
    • Bent flywheel
    If not within specifications, secure the flywheel bolts or replace the flywheel.
    If all inspections were within specification, replace the starter motor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Fastener Tightening Specifications for the 6.6 L engine, Fastener Tightening Specifications for 7.2 L engine, XXXX for the 7.8 L engine, Fastener Tightening Specifications for the 8.1 L engine,
    •  Engine Flywheel Replacement for the 6.6 L engine, XXXX for 7.8 L engine, Engine Flywheel Replacement for the 8.1 L engine.
    •  Starter Motor Replacement