2012 2500HD Cruise Control Not Working

hutch08 · August 23, 2015

Hey,

I just recently picked up a new truck, it's a 2012 GMC Sierra 2500HD Denali with 85,000km.
So far I'm really enjoying being back in a Duramax, one issue I noticed was that the Cruise Control isn't working.

The light on the steering wheel comes on, but nothing on the dash. I did some looking online and rear about a potential brake light or brake pedal switch issue.
All brake lights work as they're supposed to, and tapping/wiggling the brake switch does nothing while attempting to set the cruise.

I couldn't find a fuse for the cruise control to check??? Also tried playing with the trailer brake controller and parking brake.. still nothing.

Then I tried playing with the tilt steering, and voila... I managed to get the cruise to work and the light on the dash to come on for a minute. As soon as I moved the wheel I lost it again.

If I cycle the tilt steering up and down and hold it all the way in the lowest position it will intermittently work.
This leads me to believe everything is functioning properly, and I either have a broken wire or loose connection somewhere on the steering column.

Does anyone have a wiring diagram or insight on where I should be looking for this wiring issue?

Thanks!

hutch08 · August 23, 2015

*Update* Removed the plastic panel underneath the dash and bottom section of the steering column. Inspected wiring and found that the Grey wire was completely broke off going into the connector at the bottom of the steering wheel. Found a wiring diagram online and sure enough the Grey wire is for the Set/Cancel/Resume function. I haven't fixed it yet, but I'm sure that it will resolve my issue.