The 2020 RAM ProMaster 3500 is available as a 3-door, 2-seat cargo van. Starting at $37,945, the 2020 RAM ProMaster 3500 Long Wheelbase Cargo is powered by a 3.6LL , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated The top of the line 2020RAMProMaster 3500Cargo , priced at $ 36,395 , is powered by a 3.6LL , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated