Buick Repair Questions? Ask a Mechanic for Answers ASAP
There are 3 fuses that power the Cruise Control & the Cruise is controled thru the PCM
Fuse 5 in the Relay Center behind Glove boxFuses 5c & 1d in the Inside Fuse Panel Driver side
Fuse 5 also powers the Fuel Control & A/C, so if those are working, then the Fuse is not bad.
Be sure the Brake Lights are working.
Typically it is usually the Cruise Control Servo
Here is wiring diagrams;