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:
Pulling a Trailer
Here are some important points:
There are many different laws, including speed limit restrictions, having
to do with trailering. Make sure the rig will be legal, not only where you live
but ...
Add-on Electrical Equipment
The OnStar system is integrated
into the electrical architecture of the
vehicle. Do not add any electrical
equipment. See Add-On Electrical
Equipment. Added
electrical equipment may interfer ...
Programming the Power Windows
If the vehicle battery has been
recharged, disconnected or not
working, the front power windows
will need to be reprogrammed for
the express-up feature to work.
Before reprogramming, replace ...