Cruise control issue

Had the truck in the shop for the #27 fuse problem and mentioned to them the cruise wasn't working. They put a new switch in on the steering wheel which did didn't fix it. They then told me they cleared the codes and the cruise is now fine, which it's been for about a week. Now it just started intermittently not working. I'll go to turn the cruise on and no lights come on, a few minutes into the drive I'll try it again and it may or may not work. Anyone have a clue, I'm not overly pleased with my dealer at this point...

Thanks!