Hello All, I am writting this post after I have read so many posts regarding this topic. I tried to find anyone who had faced with a similar problem but out of luck.

Mine is a 2007 Yukon (same as Tahoe) and the problem is both sides driver and passenger heated seat cushions and backs are not warming up, both switches appear to be functional and they stay lit when its activated and turns off properly when pressed. They don't turn off on their own like I read in other posts.
I also checked the 2nd row and its working fine on both sides, the cushion gets warmed up. but the problem is only on the front. I took out the front driver seat today inspected the wiring remove the cushion trim and looked for sign of damage and everything looks fine.
So anyone have any ideas or options that I can try???

 

Welcome to the forum.

Check to see if you have voltage at the seat heater terminals. If not, you will need to trace back the wiring to find where you're losing the voltage.