Vehicle and Power Issues

OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not operate if the battery is discharged or disconnected.

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    Under the Hood
    A 3.5-liter V-6 produces 201 horsepower in front-wheel-drive Terrazas, and 196 hp in all-wheel-drive models. The new 3.9-liter V-6 features variable valve timing and develops 240 hp and 240 pounds ...

    Pulling a Trailer
    Here are some important points: • There are many laws, including speed limit restrictions that apply to trailering. Check for legal requirements. • Do not tow a trailer at all during the ...

    RELEASE PARK BRAKE
    This message is displayed if the electric parking brake is on while the vehicle is in motion. Release it before you attempt to drive. See Parking Brake for more information. ...