Come to find out, the DPF won't go into a regeneration cycle (normally when it gets to 80% full) while pulling a trailer (prevents melting the trailer with 1200F exhaust). The DPF shouldn't fill up so quickly at freeway speeds, but maybe its because the engine was so new. Just needed to...
Any update? I'm stranded in Kansas with similar issues and this dealership in Colby won't look at it for two days. I'm stranded here on my own until then, I guess. FCW, ESC, Exhaust System, Cruise Control, Throttle Control warnings all came in while driving I70 with a trailer.