Verify Minutes and Expiration
Push 
and say “minutes” then “verify” to check how many minutes remain and their expiration date.
See also:
Vehicle Overview
The GMC Canyon is almost identical to the Chevrolet Colorado, sharing the
same platform but adding some style and trim differences that appeal to those
who want a little more flash in their midsiz ...
How OnStar Service Works
Automatic Crash Response, Emergency Services, Crisis Assist, Stolen Vehicle Assistance, Vehicle Diagnostics, Remote Door Unlock, Roadside Assistance, Turn-by-Turn Navigation, and Hands-Free Calling ar ...
OnStar Overview
If equipped, this vehicle has a comprehensive, in-vehicle system that can connect to a live Advisor for Emergency, Security, Navigation, Connection, and Diagnostic Services.
The OnStar system statu ...