Diagnostic Aids
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. 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 12V charging system.
- Verify that the ground connections G103 and G201 are clean and tight.