Circuit/System Verification
WARNING: This page is about a different car, the 2007 Pontiac Montana SV6, 2007 Chevrolet Uplander, and 2007 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Perform this diagnostic if the OnStar® Call Center operator can clearly be heard but the operator is unable to hear the caller.
Ignition ON, press OnStar® Call button. Verify that your voice cannot be heard clearly by the OnStar® Call Center.
- If your voice can be heard clearly, refer to Testing for Intermittent Conditions and Poor Connections .