See also:

Security
OnStar provides services like Stolen Vehicle Assistance, Remote Ignition Block, and Roadside Assistance, if the vehicle is equipped with these services. OnStar can unlock the vehicle doors remotely, i ...

Customer Assistance Offices (U.S. and Canada)
GMC encourages customers to call the toll-free number for assistance. However, if a customer wishes to write or e-mail GMC, the letter should be addressed to: United States GMC Customer Assistance ...

Rear Window Wiper/Washer
The rear wiper controls are on the end of the windshield wiper lever. ON: Press the upper portion of the button for continuous rear window wipes. OFF: The rear wiper turns off when the button is r ...