Circuit/System Verification

IMPORTANT:

When contacting the OnStar Call Center, explain to the OnStar advisor that this call is for vehicle diagnostic purposes.
It is necessary to have the vehicle in an open outside area where a cellular call can be successfully placed and GPS data can be received from satellites.

Verify that the horn, lights, and the doors locks on the vehicle operate properly.
- If the applicable system does not operate properly, refer to Diagnostic System Check - Vehicle .
Contact the OnStar® Call Center by pressing the blue OnStar® button. Verify with the OnStar® advisor that all of the remote functions (door locks and horn)work.
- If unable to connect with the OnStar® call center, refer to Unable to Contact OnStar Call Center .
- If the door locks do not operate when requested, refer to Circuit/System Testing Remote Door Locks Malfunction.
If the horn does not operate when requested, refer to Circuit/System Testing Remote Horn Malfunction.