GMC 2009 Yukon XL Owner's Manual page 198

Reducing Speed While Using Cruise
Control
To reduce the vehicle speed while using cruise control:
•
Press and hold the SET– button on the steering
wheel until the desired lower speed is reached,
then release it.
•
To slow down in very small amounts, press
the SET– button on the steering wheel briefly.
Each time this is done, the vehicle goes about
1 mph (1.6 km/h) slower.
Passing Another Vehicle While Using
Cruise Control
Use the accelerator pedal to increase the vehicle speed.
When you take your foot off the pedal, the vehicle will
slow down to the previous set cruise speed.
3-14
Using Cruise Control on Hills
How well the cruise control will work on hills depends
upon the vehicle speed, load, and the steepness of the
hills. When going up steep hills, you might have to step
on the accelerator pedal to maintain the vehicle's speed.
When going downhill, you might have to brake or shift to
a lower gear to keep the vehicle's speed down. When the
brakes are applied the cruise control turns off.
Ending Cruise Control
There are three ways to end cruise control:
•
Step lightly on the brake pedal.
[
•
Press the button on the steering wheel.
• I
Press the button on the steering wheel.
Erasing Speed Memory
The cruise control set speed memory is erased when
the cruise control or the ignition is turned off.