My son's Buick just took a dump on him, and he needed something to get him by for a year when he wants to buy something new. I picked up a 1994 GMC K1500(sorry) Sierra SL with a 305, automatic, AC, cruise, no carpet work truck (ex-state vehicle).

The cruise doesn't work. I found a forum online with a diagnostic procedure, but the schematic they showed was for a 1994 K1500 Suburban, and it's different that this pickup.

Would one of you happen to have the correct one, or some sort of troubleshooting info? The fuse is good, power to and from the switch, etc. Also, on this model is the brake light switch and the interrupt switch one in the same? There are two sets of contacts one NO and one NC.

Any info would be greatly appreciated.

Here's what he's driving right now, but he wants to keep it for "special occasions".