Circuit/System Verification
IMPORTANT:
It is necessary to inform the OnStar® Call Center advisor that this call is for vehicle diagnostic purposes.
- Observe that the horn, lights, and the doors locks on the vehicle operate properly.
- If the applicable system does not operate properly, refer to Diagnostic Starting Point - Horns , Diagnostic Starting Point - Lighting , or Symptoms - Remote Functions - Doors respectively.
- 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 the remote functions do not work, use the scan tool to access the STID and ESN and contact the General Motors Technical Assistance Center