See also:

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 ...

Using Voice Commands During a Planned Route
Cancel Route 1. Push X. System responds: “OnStar ready,” then a tone. Say “Cancel route.” System responds: “Would you like to cancel route directions to your destination?” 2. Say “Ye ...

CD-R- or CD-RW- Supported File and Folder Structure
The radio supports: • Up to 50 folders. • Up to 8 folders in depth. • Up to 50 playlists. • Up to 255 files. • Playlists with an .m3u or .wpl extension. • Files with an .mp3, .wma, o ...