Drive Systems; All-Wheel Drive; Antilock Brake; System (Abs) - GMC Yukon Denali 2013 Owner's Manual

9-32 Driving and Operating
To disable or enable Tow/Haul
Grade Braking within the current
ignition key cycle, press and hold
the Tow/Haul button for
three seconds. A DIC message will
be displayed. See Transmission
Messages on page 5 42.
See Towing Equipment on
page 9 61 for more information.
For other forms of grade braking,
see Automatic Transmission on
page 9 28 and Cruise Control on
page 9 38.

Drive Systems

All-Wheel Drive

With this feature, engine power is
sent to all four wheels all the time.
This is like four-wheel drive, but
there is no separate lever or switch
to engage or disengage the front
axle. It is fully automatic, and
adjusts itself as needed for road
conditions.
Brakes

Antilock Brake

System (ABS)

This vehicle has the Antilock Brake
System (ABS), an advanced
electronic braking system that helps
prevent a braking skid.
When the engine is started and the
vehicle begins to drive away, ABS
checks itself. A momentary motor or
clicking noise might be heard while
this test is going on, and it might
even be noticed that the brake
pedal moves a little. This is normal.
If there is a problem with ABS, this
warning light stays on. See Antilock
Brake System (ABS) Warning Light
on page 5 22.