2001 - 2004 GM 6.6L LB7 Duramax | Engine Tuning by PPEI

Awesome tunes and excellent CS

Couldn't be happier with the tunes for my LB7! Used an AutoCal V2 (not purchased from PPEI) that had previous tunes loaded which caused some issues. Zach and the CS team bent over backwards to help me through the issues and got me up and running. All of my issues were "self-inflicted" and am grateful for their support. I would not hesitate to recommend PPEI to anyone looking for the best tunes available and over the top support. Hats off to everyone at PPEI!

All around solid.

Great power. Great driveability. Smooth. Great customer service Great instructions

Lb7 engine and trans tune

Highly recommended use to have edge tuner but these feel so much better woke my lb7 up a lot more power bc and love the shift firmness i never tried level 5 and probably won’t but im very happy i went with these guys and can’t beat the 30%off my only problem was i bought an autocal from somewhere else and made the process a pain not their fault though and shout out to them for helping me through the process i recommend just buying it from them that way they will probably have it all set up for you and already connected to their flash scan