See also:

Reactivation for Subsequent Owners
Push and follow the prompts to speak to an Advisor as soon as possible after acquiring the vehicle. The Advisor will update vehicle records and will explain the OnStar service offers and options ...

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 ...

Button Retainer
Floor mats with a button-type retainer. Removing and Replacing the Floor Mat 1. Pull up on the rear of the mat to unlock and remove. 2. Reinstall the floor mat by lining up the floor mat openings ...