GMC 1995 Safari Owner's Manual page 87

Cruise Control (Option)
t:
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With Cruise Control, you can maintain a speed of about 25 mph (40 kmk)
or more without keeping your foot on the accelerator. This can really help
on long trips. Cruise Control does not work at speeds below about 25 mph
(40 k d h ) .
When you apply your brakes, the Cruise Control shuts off.
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