I live in Minnesota. Rust HUGE issue. I bought my '07 Ram 3500 with then new 6.7l Cummins in Arkansas in 2018. For the primary reasons of rust. Plus. I insisted on a 6-speed manual transmission. (Which is non-existent since 2019.) Just not trusting the Chrysler auto. (I have sence learned. To upgrade Chrysler's auto transmission cooling fans and pump does wonder.) That's its vulnerability.