Horn
Press 
on the steering wheel pad to sound the horn.
See also:
All-new interior design
An all-new sophisticated, luxurious interior incorporates a clean, sculpted
contemporary design featuring genuine materials, fabrics and low-gloss, tactile
surfaces.
Refinements include dual-fir ...
Trip Odometer
The trip odometer can record the
number of kilometers or miles
traveled for up to two trips.
The trip odometer is part of the
Driver Information Center (DIC);
for more information see Driver
...
Using Voice Commands
During a Planned Route
Cancel Route
1. Push . System responds:
“OnStar ready,” then a tone.
Say “Cancel route.” System
responds: “Would you like to
cancel route directions to your
destination?”.
2. Say “Yes.” Syst ...