Drive Systems; All-Wheel Drive - GMC Yukon Denali 2014 Owner's Manual

Also see Tow/Haul Mode under
Towing Equipment on page 9-59 for
more information.
The Tow/Haul Mode works with the
®
Autoride feature, if the vehicle has
this, to enhance the ride when
trailering or with a loaded vehicle.
See Continuous Damping Control
(CDC) on page 9-37.
Tow/Haul Mode Grade Braking
(6-Speed Automatic
Transmission)
This feature is only enabled while
the Tow/Haul Mode is selected and
the vehicle is not in the Range
Selection Mode. See Tow/Haul
Mode listed previously and Manual
Mode on page 9-30. Tow/Haul Mode
Grade Braking assists in
maintaining desired vehicle speeds
when driving on downhill grades by
using the engine and transmission
to slow the vehicle.
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 9-59 for more information.
For other forms of grade braking,
see Automatic Transmission on
page 9-27 and Cruise Control on
page 9-38.
Driving and Operating

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.
9-31