Fuel System Messages

FUEL LEVEL LOW

This message displays and a chime sounds if the fuel level is low. Refuel as soon as possible. See Fuel Gauge   and Fuel   for more information.

TIGHTEN GAS CAP

This message may display along with the check engine light on the instrument panel cluster if the fuel cap is not tightened properly. See Malfunction Indicator Lamp  . Reinstall the fuel cap fully. See Filling the Tank  . The diagnostic system can determine if the fuel cap has been left off or improperly installed. A loose or missing fuel cap allows fuel to evaporate into the atmosphere. A few driving trips with the cap properly installed should turn this light and message off.

    See also:

    Filling a Portable Fuel Container
    WARNING Never fill a portable fuel container while it is in the vehicle. Static electricity discharge from the container can ignite the fuel vapor. You can be badly burned and the vehicle damaged ...

    How OnStar Service Works
    Automatic Crash Response, Emergency Services, Crisis Assist, Stolen Vehicle Assistance, Vehicle Diagnostics, Remote Door Unlock, Roadside Assistance, Turn-by-Turn Navigation, and Hands-Free ...

    RELEASE PARK BRAKE SWITCH
    For vehicles with the electric parking brake, this message displays if the switch is pulled while the vehicle is moving. See the electric parking brake information under Parking Brake (Elect ...