End a Call
Push 
. System responds: “Call ended.”
See also:
Satellite Radio
Vehicles with an XM™ satellite radio tuner and a valid XM satellite radio subscription
can receive XM programming. ...
Battery Load Management
The vehicle has Electric Power Management (EPM) that estimates the battery's temperature and state of charge. It then adjusts the voltage for best performance and extended life of the battery.
When t ...
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:
...