Hands-Free Calling
1. Push 
. System responds:
“OnStar ready.”.
2. Say “Dial.” System responds:
“Please say the name or number to call.”.
3. Say the entire number without pausing, including a “1” and the area code. System responds:
“OK calling.”
See also:
Replacement Bulbs
For replacement bulbs not listed here, contact your dealer. ...
Audio Source
VOL/ (Volume/Power):
1. Press to turn the radio on or off.
2. Turn to increase or decrease the
volume of the active source
(i.e., current audio source, active
navigation voice guidance,
or ...
Following Distance
Stay at least twice as far behind the vehicle ahead
as you would when driving your vehicle without
a trailer. This can help you avoid situations
that require heavy braking and sudden turns. ...