Diagnostics

OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the veh ...

OnStar Additional Information

Transferring Service Push to request account transfer eligibility information. The Advisor can assist in canceling or removing account information. If OnStar receives information that vehicle owne ...

See also:

Express Window Anti-Pinch Override
WARNING If express override is activated, the window will not reverse automatically. You or others could be injured and the window could be damaged. Before you use express override, make sure t ...

Maximum load rating
WARNING   Do not overload the tires by exceeding the specified load limit as indicated on the Tire and Loading Information placard on the driver's door B-pillar. Overloading the tires c ...

When It Is Time for New Tires
Factors such as maintenance, temperatures, driving speeds, vehicle loading, and road conditions affect the wear rate of the tires. Treadwear indicators are one way to tell when it is time for new ...