OnStar

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Special Application Services
. Severe Commercial Use Vehicles Only: Lubricate chassis components every 5 000 km/3,000 mi. - Have underbody flushing service performed once a year. ...

Power Reclining Seatbacks
To adjust a power seatback, if available: - Tilt the top of the control rearward to recline. - Tilt the top of the control forward to raise. ...

Reporting Safety Defects to the United States Government
If you believe that your vehicle has a defect which could cause a crash or could cause injury or death, you should immediately inform the National Highway Traffic Safety Administration (NH ...