OnStar Services

See also:

Reclining Seatbacks
WARNING You can lose control of the vehicle if you try to adjust a manual driver seat while the vehicle is moving. Adjust the driver seat only when the vehicle is not moving. WARNING If either se ...

Tire Pressure for High-Speed Operation
WARNING Driving at high speeds, 160 km/h (100 mph) or higher, puts an additional strain on tires. Sustained high-speed driving causes excessive heat buildup and can cause sudden tire failure. Yo ...

Service Bulletins
Service Bulletins give additional technical service information needed to knowledgeably service General Motors cars and trucks. Each bulletin contains instructions to assist in the diagnosis ...