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:
Front Fog Lamp Light
The fog lamp light comes on when the fog lamps are in use.
The light goes out when the fog lamps are turned off. See Fog Lamps on page 6‑5 for more information. ...
Brakes
This vehicle has disc brakes. Disc brake pads have built-in wear indicators that
make a high-pitched warning sound when the brake pads are worn and new pads are
needed. The sound can come and go o ...
Oil Pressure
This display shows the oil pressure in either kilopascals (kPa) or pounds per square inch (psi). ...