Single Tune 2007.5-2010 LMM Duramax for EFILive 2017-2019 Puts your vehicle near the

Puts your vehicle near the 440 RWHP mark

CSP5 Switch optional but required for switching tunes

Our 4 Tune Pack - Best in Class

5 in L x 4

You won't find a better fit

Single Tune 2007.5-2010 LMM Duramax for EFILive 2017-2019 Puts your vehicle near theYour choice of the 5 power levels, including light tow, heavy tow, race, sport economy and optimized stock for your 2007,2008,2009, or 2010 Chevy Silverado or GMC Sierra. Choose your power level HEAVY TOW For towing from 8,000lbs up to Gross Vehicle Weight Rating Wider torque curve assists heavy loads + 60 RWHP, + 120 ft lbs torque Exhaust temperatures drop up to 100F under full load LIGHT TOW For those towing below 8,000lbs Perfect balance of sport