Place a Call Using a Stored Number
1. Push 
. System responds:
“OnStar ready.” 2. Say “Call <name tag>.” System responds: “OK, calling <name tag>.”
See also:
Store a Name Tag for Speed Dialing
1. Push . System responds:
“OnStar ready.” 2. Say “Store.” System responds:
“Please say the number you would like to store.” 3. Say the entire number without pausing. System responds:
...
Roadside Assistance Program
U.S.: 1-888-881-3302
TTY Users (U.S.): 1-888-889-2438
Canada: 1-800-268-6800
Mexico: 01-800-466-0801
As the owner of a new GMC, you are automatically enrolled in the Roadside Assistance program.
...
Using the “Store” Command
1. Press and hold for two seconds.
2. Say “Store.” 3. Say the phone number or group of numbers you want to store all at once with no pauses, then follow the directions given by the system to sav ...