Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring System. If a diagnostics check is needed between e-mails, push 
, and an Advisor can run a check.
See also:
Adding Equipment to the Airbag-Equipped Vehicle
Q: Is there anything I might add to or change about the vehicle that could keep the airbags from working properly?
A: Yes. If you add things that change your vehicle's frame, bumper system, height, f ...
Testing the Alarm
To test the alarm:
1. Lower the driver window and open the driver door.
2. Press lock on the RKE transmitter.
3. Close the door and wait for the security light to go out.
4. Reach in through the w ...
Sensors
The solar sensor, located in the defrost grille in the middle of the instrument panel, monitors the solar heat. Do not cover the solar sensor or the system will not work properly.
The interior te ...