See also:

Rear Seats
The vehicle's rear seat has head restraints in the outboard seating positions that cannot be adjusted. Rear outboard head restraints are not designed to be removed. ...

Brake System Warning Light
With the ignition on, the brake system warning light comes on when the parking brake is set. If the vehicle is driven with the parking brake engaged, a chime sounds when the vehicle speed is greater t ...

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 vehic ...