Horn
Pressa 
on the steering wheel pad
to sound the horn.
See also:
Turning the Rear Vision Camera System Off or On
To turn off the rear vision camera system, press and hold , located on the inside rearview mirror, until the left indicator light turns off.
The rear vision camera display is now disabled.
To turn t ...
Capacities and Specifications
Engine Specifications
...
Roadside Assistance Program
As the owner of a new GMC, you are automatically enrolled in the Roadside Assistance
program. See Roadside Assistance Program (U.S. and Canada) on page 13‑7 or Roadside
Assistance Program (M ...