Stellantis unveils redesigned Ram Heavy Duty trucks with new engines and features, aiming to reverse a three-year sales slump.

The 2025 Ram 2500 and 3500 Heavy Duty models feature two engines — the standard 6.4-liter HEMI V-8 engine and a new 6.7-liter Cummins Turbo Diesel engine that produces 430 hp and 1,075 lb.-ft. of ...