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PPEI EFILive Custom Tuning by Kory Willis | 2001-2010 Chevy/GMC Duramax LB7/LLY/LBZ/LMM


Custom EFILive tune(s) from PPEI & Kory Willis for your 2001-2010 Chevy/GMC Duramax LB7/LLY/LBZ/LMM 6.6L diesel is available as a single-tune or DSP5 tune. Requires an EFILive V2 or autocal to load tunes onto. DSP5 tuning requires optional switch for shifting power levels.

Please Call for Availability


2001-2004 LB7 & 2004.5-2005.5 LLY Power Levels

Tune Level/Switch PositionStock TransmissionBuilt Transmission
1-Optimized Stock+15HP+30HP

2006-2007 LBZ & 2007.5-2010 LMM Power Levels

Tune Level/Switch PositionStock TransmissionBuilt Transmission
1-Optimized Stock+30HP+30HP

Optional Transmission Tuning

PPEI's optional transmission tuning for your 2001-2010 Allison 5 or 6 speed equipped Duramax will allow for the torque converter to be applied in second gear (while in tow haul-request otherwise if you want it for more than just tow haul). This is good for knocking off close to at least .05 off your track times! No more lock up boxes needed, we handle it all by a simple flash! Transmission tuning is super beneficial to trucks running bigger than stock turbo applications, it is really nice to stay on top of the charger at part throttle and not “bog down” in between shifts along with if you have big tires for more inviting downshifts! Please list your vin number and your mods into the checkboxes below and also if you have special instructions.


  • PPEI EFILive Single Tune: PPEI10489
  • PPEI EFILive DSP5 Tune: PPEI10043

WARNING! These products are capable of disabling emissions equipment. If using DPF/EGR removed tuning, these high performance products are intended SOLELY for offroad use or closed-course racing use.