Diagnostic Aids
WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for a Set/Coast switch stuck in the engaged position or the signal circuit is shorted to voltage.
- For an intermittent, refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS .