Circuit/System Verification
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
This procedure is not used in Brazil.
IMPORTANT:
- It is necessary to inform the OnStar® Call Center 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, lights, or horn) work.
- If unable to connect with the OnStar® call center, refer to Unable to Contact OnStar Call Center .
- If the remote functions do not operate when requested, replace the CIM.