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.

Observe the driver information center (DIC) messaging that would indicate the charging system requires service.

Inspect for the following conditions:

Loose or poor connections at the hybrid drive motor battery X350 18-way connector.
Verify that the 12 volt battery and charging system is within normal operating range and if a battery charger was connected to the vehicle.
Loose or damaged battery terminals.
Loose or corroded connections at the accessory dc power control module (APM).