GMC Yukon XL 2015 Owner's Manual page 24

While using Range Selection Mode,
cruise control and the Tow/Haul
Mode can be used.
Grade Braking is not available when
Range Selection Mode is active.
See Tow/Haul Mode on page 9-36.
Four-Wheel Drive
If the vehicle has four-wheel drive,
you can send the engine's driving
power to all four wheels for extra
traction.
Automatic Transfer Case
Two Speed Automatic
Transfer Case
In Brief
Single Speed Automatic
Transfer Case
The transfer case knob is to the left
of the steering wheel. Use this knob
to shift into and out of the different
four-wheel drive modes.
2 : This setting is used for driving
in most street and highway
situations.
AUTO: This setting is ideal for use
when road surface traction
conditions are variable.
1-17