Pontiac 1995 Grand Prix Owner's Manual page 94

Here's the second way to go to a higher speed:
0
Move the cruise switch from ON to WA. Hold it
there until you get up to the speed you want, and
then release the switch.
0
To increase your speed in very small amounts, move
the switch to WA for less than half a second and then
release it. Each time you do this, your vehicle will go
1 mph (1.6
km/h)
faster.
The accelerate feature will only work after you set the
the cruise control speed by pushing the SET button.
To Reduce Speed While Using Cruise Control
There are two ways to reduce your speed while using
cruise control:
0
0
Push in the SET button until you reach the lower
speed you want, then release it.
To slow down in very small amounts, push the SET
button for less than half a second. Each time you do
this, you'll go 1 mph (1.6
km/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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