Pull one plug and see what it is. As far as the heat, you bet it is a blend door, on my Ram the whole dash had to be suspended up and out of the way to access the HVAC, probably like that on all the new cars... rant

The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!