olyelr
Senior Member
The fact this seems to be a common issue with 2018s only makes me think it has something to do with the only thing that really differs between 2017 and 2018: factory head unit. Which just so happens to have control of the seat heaters (in addition to the hardwired switches of course)
Well, really the entire truck differs from the 4th gens. And the 4th gens also had heater controls on the radio as well as buttons on the dash, so while that is the same they are different units.