GMC 2001 Safari Owner's Manual page 119

Increasing Speed While Using Cruise Control
There are two ways to go to a higher speed:
D
Use the accelerator pedal to get to the higher speed.
Press the button at the end of the lever, then release
the button and the accelerator pedal. You'll now
cruise at the higher speed.
D
Move the cruise switch from ON to R/A. Hold it
there until you get up to the speed you want, and
then release the switch. To increase your speed in
very small amounts, move the switch to R/A briefly.
Each time you do this, your vehicle will go about
1 mph (1.6 km/h) faster.
Reducing Speed While Using Cruise Control
There are two ways to reduce your speed while using
cruise control:
D
Press the button at the end of the lever until you
reach the lower speed you want, then release it.
D
To slow down in very small amounts, press the
button briefly. Each time you do this, you'll go
1 mph (1.6 km/h) slower.
2-40
Passing Another Vehicle While Using Cruise Control
Use the accelerator pedal to increase your speed. When
you take your foot off the pedal, your vehicle will slow
down to the cruise control speed you set earlier.
Using Cruise Control on Hills
How well your cruise control will work on hills depends
upon your speed, load and the steepness of the hills.
When going up steep hills, you may want to step on the
accelerator pedal to maintain your speed. When going
downhill, you may have to brake or shift to a lower gear to
keep your speed down. Of course, applying the brake takes
you out of cruise control. Many drivers find this to be too
much trouble and don't use cruise control on steep hills.
Ending Cruise Control
There are two ways to turn off the cruise control:
D
Step lightly on the brake pedal.
D
Move the cruise switch to OFF.
Erasing Speed Memory
When you turn off the cruise control or the ignition,
your cruise control set speed memory is erased.