See also:

Scheduled Maintenance
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Accessories and Modifications
When you add non-GM accessories to your vehicle they can affect your vehicle’s performance and safety, including such things as, airbags, braking, stability, ride and handling, emissions systems, ...

Erasing Universal Home Remote Buttons
The programmed buttons should be erased when the vehicle is sold or the lease ends. To erase either Rolling Code or Fixed Code on the Universal Home Remote device: 1. Press and hold the two outs ...