2007.5-2010 GM 2500HD/3500HD 6.6L LMM Duramax Chips, Modules & Tuners

Unlock your 6.6L Duramax LMM's full power by installing any of our featured aftermarket  modules and tuners! Gain additional horsepower, torque and throttle by upgrading your stock PCM to a performance-oriented tuner! Engineered to overhaul your truck's fuel curves and pressures, plus shift points for an enhanced gear-holding and optimized shift pressures, GM 2500HD/3500HD owners can expect an excellent increase in overall performance. Achieve improved 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!  GM Duramax Fitments: 2007, 2009, 2010 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments.