Circuit/System Verification
- Ignition ON/vehicle in Service Mode, radio ON.
- Verify that audio is heard clearly through all speaker channels when tuning radio to a known good station.
- If audio is not heard clearly
Refer to Speaker Malfunction (UQA) , Speaker Malfunction (UQS) and/or Speaker Malfunction (UQH)
- If audio is heard clearly
- If audio is not heard clearly
- Verify that the Connecting to OnStar® message is heard clearly through the audio system when the OnStar® blue button is pressed.
- If OnStar® message is noisy or distorted
Refer to Circuit/System Testing
- If OnStar® message is heard clearly
- If OnStar® message is noisy or distorted
- All OK.