The engine maker's new 6.7-liter Turbo Diesel for Ram Heavy Duty's line of pickups and cab-and-chassis trucks comes with news of an extended Cummins/Ram diesel partnership through 2030.

With the half-ton Ram 1500 getting a mid-cycle update for 2025MY, it's time for the full-fledged Ram 2500 and 3500 workhorse lineup for a major update. The Ram Heavy Duty trucks' revamp for the new year keeps the Hemi V8 engine alive,

Ram's heavy-duty trucks receive a comprehensive refresh that includes new exterior styling and interior upgrades.

Powering the most basic Ram 2500 and 3500 pickups is still the 6.4-liter gasoline-burning Hemi V8, which drops 5 hp, now delivering 405 hp and 429 lb-ft of torque, pushed through an eight-speed ZF HD 8HP75 transmission.

Ram unveils its lineup of updated 2025 HD trucks, with the offering getting a revised diesel engine and a new 8-speed automatic transmission.

Following last year's update of the light duty Ram 1500, the heavy duty Ram trucks get a refresh for 2025 with a redesigned Cummins 6.7L diesel and more tech

Ram has finally revealed its 2025 HD and Chassis Cab lineups, incorporating many of the flashy upgrades that have already hit the standard Ram 1500 pickup. But there’s more to this overhaul than a fancier cabin and a new grille.