Horn
Press 
on the steering wheel pad
to sound the horn.
See also:
Rear Safety Belt Comfort Guides
This vehicle may have rear shoulder belt comfort guides
for each outside passenger position in the rear seat. If
not, they are available through your dealer/retailer. The
guides may provide adde ...
Automatic Crash Response
In a crash, built in sensors can automatically alert an
OnStar advisor who is immediately connected to
the vehicle to see if you need help. ...
Engine Oil Life System
The engine oil life system calculates engine oil life
based on vehicle use and displays a DIC message when
it is necessary to change the engine oil and filter. The
oil life system should be rese ...