See also:

Roadside Assistance Program
For U.S. purchased vehicles, call 1-800-252-1112; (Text Telephone (TTY): 1-888-889-2438). For Canadian purchased vehicles, call 1-800-268-6800. Service is available 24 hours a day, 365 days a year ...

PhatNoise a segment first
Also available is the first-in-segment Mobile Digital Media Powered by PhatNoise system. PhatNoise is a wallet-sized, 40-gigabyte hard drive that installs in the Terraza's overhead rail system. Th ...

Cellular and GPS Antennas
Avoid placing items over or near the antenna to prevent blocking cellular and GPS signal reception. Cellular reception is required for OnStar to send remote signals to the vehicle. ...