Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. 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.