GMC 1994 Sonoma Owner's Manual page 89

To Reduce Speed While Using Cruise Control
Push in the
button at the end
of the lever until
you reach
the
lower speed you
want, then release
it.
To slow down in very small amounts, push the button for less than half
a second. Each time you do this, you'll go I mph (1.6 k d h ) slower.
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
have 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.
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