Diagnostic Aids
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- A high or low voltage DTC in multiple modules indicates a concern in the charging system. Refer to Charging System Test .
- Verify that the ground connections G103 and G201 are clean and tight.