Circuit/System Verification
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- Tune radio to a known good station and verify the audio is heard clearly through all speaker channels.
- If audio is not heard clearly, refer to Speaker Malfunction .
- Ignition ON, radio ON, set volume to comfortable level and press OnStar® Call Center button. Verify Connecting to OnStar® message is heard clearly through the audio system.
- If OnStar® message is noisy or distorted, refer to Circuit/System Testing .