Fuel System Messages

ECO MODE ON

On some models, this message displays when the fuel economy mode has been turned on by pressing the eco button near the shift lever. See Fuel Economy Mode on page 9‑31 for more information.

FUEL LEVEL LOW

This message displays when the vehicle is low on fuel. Refuel as soon as possible.

TIGHTEN GAS CAP

This message displays when the fuel cap is not on tight. Tighten the fuel cap.

    See also:

    Engine Coolant Heater
    The engine heater can provide easier starting and better fuel economy during engine warm-up in cold weather conditions at or below −18°C (0°F). Vehicles with an engine heater should be plugged ...

    Online Owner Center
    Manage your vehicle (U.S.) at gmc.com. Click on “Owners,” then “Manage My GMC/Owners Login.” Information and services customized for your specific vehicle — all in one convenient place. ...

    Flash-to-Pass
    This feature is used to signal to the vehicle ahead that you want to pass. If the headlamps are off or in the low-beam position, pull the turn signal lever toward you to momentarily switch to high be ...