Just purchased a 2013 GMC Sierra 2500 HD. I'm super stoked!! This is my second Diesel. My first was an old Chevy 3500 k 6.2L crew cab. She was a beast!! I do have a Question. I am smelling the hot smell no rubber, electrical or anything just hot. Is this Regen? I have no message and it's not asking me to keep driving. Any thoughts. I think it's coming from my DPF can. Exhaust is a bit hotter than the first time I checked but not scalding. And I think she might be idling a bit higher than normal.