OnStar Services

See also:

Tire Pressure
The display will show a vehicle with the approximate pressures of all four tires. Tire pressure is displayed in either kilopascal (kPa) or pounds per square inch (psi). See Tire Pressure Mon ...

Fuel Gauge
When the ignition is on, the fuel gauge tells you about how much fuel you have left in your tank. An arrow on the fuel gauge indicates the side of the vehicle the fuel door is on. When the fue ...

Brake System Warning Light
The vehicle brake system consists of two hydraulic circuits. If one circuit is not working, the remaining circuit can still work to stop the vehicle. For normal braking performance, both cir ...