received it new December 2017 SN# 91118209. this is not to fault the technician. the factory and the dealership have made this agreement that insures the dealer gets the service call. then they don't do the work of training the service people. I have very competent techs working for me and after spending $160000.00 on two trucks the factory will not train or provide service manuals (at any cost) to help us help ourselves. so we sit waiting. unfortunately it is the sort of thing not considered and just accepted by corporations these days.