97 378 cruise stuck on

a new steering wheel with new buttons would be my first thought... buttons are hard to fix switches are easier but on the wheel is where they typically are located and that is difficult place to replace on .. it may be easier to just get a new wheel... if it were a switch or button on the dash that would be easy you could just get the switch/button replaced and rewired on it but the wheel can be troublesome, less time and effort with a new wheel

 

Replace the set switch or pull it an ck it out of dash to be sure its not fried on the inside of switch?

 

one word mechanic

 

Pull open the batt. box an look for 2 small fuse inside plastic covers, 1 of them powers the ECM, ck the small con. at batt. for louse