OnStar Services

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Different Size Tires and Wheels
If wheels or tires are installed that are a different size than the original equipment wheels and tires, vehicle performance, including its braking, ride and handling characteristics, stability, and r ...

Floor Mats
WARNING If a floor mat is the wrong size or is not properly installed, it can interfere with the pedals. Interference with the pedals can cause unintended acceleration and/or increased stopping dist ...

Drunk Driving
Death and injury associated with drinking and driving is a global tragedy. WARNING Drinking and then driving is very dangerous. Your reflexes, perceptions, attentiveness, and judgment can be affec ...