OnStar Services

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Tire Terminology and Definitions
Air Pressure: The amount of air inside the tire pressing outward on each square inch of the tire. Air pressure is expressed in kPa (kilopascal) or psi (pounds per square inch). Accessory We ...

Engine Coolant Temperature Gauge
English Shown, Metric Similar This gauge shows the engine coolant temperature. If the indicator needle moves to the hot side of the gauge toward the shaded area, the engine is too hot. If the v ...

Storing the Tire Sealant and Compressor Kit
To access the tire sealant and compressor kit: 1. Open the trunk. See Trunk. 2. Lift the cover. With Pressure Relief Button With Pressure Deflation Button 3. Turn the wing nut countercloc ...