Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, and 2003 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect the flywheel ring gear for damage or unusual wear.
- Shim the starter if applicable.
- In order to add pinion to ring gear clearance a full size shim must be used. DO NOT shim only one starter mounting bolt. There are 3 shims available in different shapes (for clearance). All are 0.039" (1 mm) thick.
Refer to illustration for STARTER MOTOR NOISE DIAGNOSIS symptom test. See Fig 1.