OnStar

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What to Add
When you do need brake fluid, use only DOT-3 brake fluid. Use new brake fluid from a sealed container only. Always clean the brake fluid reservoir cap and the area around the cap before removing i ...

Vehicle Identification Number (VIN)
This is the legal identifier for your vehicle. It appears on a plate in the front corner of the instrument panel, on the driver’s side. You can see it if you look through the windshield from ou ...

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 Weight: The ...