Folk, I have a new 2023 AT4 1500 with the Duramax. I am scheduled to have a RustCheck treatment applied to the underbody; it’s an oil-based product designed to mitigate corrosion (here in the Northeast they put lots of corrosive crap on the roads in the winter - just look at my 12yr old Highlander!). My question is this, since the D-Max engines produce lots of heat during the regen process, are there specific components on the underbody that should be avoided when applying the treatment?
Merry Christmas!
Merry Christmas!
