Horn
Press 
on the steering wheel pad to sound the horn.
See also:
Customer Assistance Offices (U.S. and Canada)
Cadillac encourages customers to call the toll-free number for assistance.
However, if a customer wishes to write or e-mail Cadillac, the letter should be
addressed to:
United States
Cadillac ...
How to Check Lubricant
To get an accurate reading, the vehicle should be on a level surface.
A. Fill Plug
B. Drain Plug
When the differential is cold, add enough lubricant to raise the level
from 0mm (0 in) to 3. ...
Hill Start Assist (HSA)
Non-hybrid vehicles with StabiliTrak have a Hill Start Assist (HSA) feature,
which may be useful when the vehicle is stopped on a grade. This feature is designed
to prevent the vehicle from rollin ...