Am looking seriously ar a new 2020 CC, 3500 dually that is some distance away. I has nearly all of my preferred options except skid plates and high idle switch (which is an exterior option). My present truck of the same configuration came standard with skid plates (which I need) and no high idle switch exterior. Can anyone tell me about these options, part numbers, what the plates cover, and what the high idle option is. Previously the high idea was set on the DIC. Also, it lacks the camper from spring package. Inexpensive option, but probably a bummer to add after the fact. Anyone familiar? BTW, dealer is not good with these questions, thus I am asking this long- trusted community.