Emergency
With Automatic Crash Response, the built-in system can automatically connect to help in a crash even if you cannot ask for it.
Push 
to connect to an Emergency Advisor.
GPS technology is used to identify the vehicle location and can provide critical
information to emergency personnel. The Advisor is also trained to offer critical
assistance in emergency situations.
See also:
How to Check Automatic Transmission Fluid
Because this operation can be a little difficult, it may be best to have this done at the dealer service department.
If not taken to the dealer, be sure to follow all the instructions here or a false ...
Odometer
The odometer shows how far the vehicle has been driven, in either kilometers or miles.
This vehicle has a tamper-resistant odometer. If the vehicle needs a new odometer installed, the new one is set ...
Other Navigation Services Available from OnStar
OnStar eNav: Allows subscribers to send destinations from Google Maps™ and MapQuest.com to their Turn-by-Turn Navigation or screen-based navigation system.
When ready, the directions will be downlo ...