TruckStuff4516

Did the dealer ever tell you what exactly happened? Sounds like a bend/crease/cut in the heater mat res-wire caused a hotspot. Not cool (pun intended). 2018 GMC Sierra - Elevation Edition

Looks like maybe the left and right recliner mechanisms are out of synch. If you take the trim cover off the seat back you should be able to get a look at the synch rod that spans the frame between the left and right recliner pivot points. If they’re out of synch it should be obvious. Might not be a simple fix, but should help you communicate better to the dealer what’s going on. 2018 GMC Sierra - Elevation Edition