Cadillac 1993 Fleetwood Owners Literature page 117

CRUISE CONTROL
With Cruise Control, you can maintain a speed of about 25 mph (40
km/h) 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 rnph (40 km/h).
When you apply your brakes, the Cruise Control shuts off.
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CAUTION:
Cruise Control can be dangerous where you can't drive safely
at a steady speed. So, don't use your Cruise Control on
winding roads or in heavy traffic.
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Cruise Control can be dangerous on slippery roads. On such
roads, fast changes in tire traction can cause needless wheel
spinning, and you could lose control. Don't use Cruise
Control on slippery roads.
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