Was interested to see if anyone had run across this problem. I've got a 2007 Tahoe LT and yesterday the fan control quit working (in both manual mode and auto = nothing). I can still adjust the auxillary controls and all seems to be working fine there, but no control in the front. After the car gets warmed up, I can feel a faint heat coming out of the vents, but can't control the speed of the fan. I've checked multiple fuses that I think would contorl the fan (based on the manual), but all looks to be working fine there. Before I take it into a shop, I wanted to ping you guys to see what suggestions you may have as well. Thank you in advance!

 

Yes, I had this problem, and someone else did about a month ago. In my case, it was a bad blower motor. It happened around this time last year. The motor is expensive, so be prepared. I think the parts and labor was around $400. In my case, the dealership went to bat for me, and GM covered the part, while I picked up the labor. As you can see below, I've been long out of B to B coverage.