Horn
Pressa 
on the steering wheel pad
to sound the horn.
See also:
Trailer Brake DIC Display Page
The ITBC system displays messages on the vehicle’s Driver Information Center (DIC). See Driver Information Center (DIC) on page 5‑33 for more information.
The display page indicates Trailer G ...
Introduction
The names, logos, emblems, slogans, vehicle model names, and vehicle body designs appearing in this manual including, but not limited to, GM, the GM logo, GMC, the GMC Truck Emblem, and SIERRA are ...
Instrument Panel Storage
For vehicles equipped with an instrument panel storage area, it is located above the glove box.
Access the storage area by pressing and holding in the driver side of the handle and pull out on the ...