2003-2004 Ram 2500/3500 5.9L Cummins Chips, Modules & Tuners

Unlock the full potential of your powerful 5.9L Cummins with our range of aftermarket tuners! Boost your truck’s horsepower, torque, and throttle response by upgrading from the stock PCM to a high-performance tuner. These tuners are designed to enhance shifting with improved gear-holding and optimized shift pressures, resulting in a significant performance boost for Ram 2500/3500 owners. Experience better injection timing, pulse, and fuel rail pressure with a new aftermarket PCM tuner from Alligator Performance. For even greater added power, check out our selection of Turbo Upgrades. Ram Cummins Fitments: 2003, 2004 Ram 5.9L Cummins. Submodel Fitments: Tradesman, Laramie, Laramie Longhorn, Big Horn, Limited, Lone Star, Power Wagon. Some exceptions apply, please see individual product pages for specific fitments.