This has been a fairly reliable vehicle, but now it seems little things are starting to show up. "Service 4 wheel drive" came up, the dealer replaced a module. After major complaining to Chevy, they authorized labor only, the dealer covering the part, which was refunded to me. I also have a "clunk" in the front end occasionally that I can feel through the steering wheel. As for this problem with the cruise, I've checked the fuse but wonder if it may be something as simple as a vacuum line off or something. I've worked on my own vehicles over the years after being married to a mechanic for over 20 years, but these new ones are beyond my expertise. Thanks.