I wasn't gonna call them out like this.. but yeah. I kept a personal log of LML cracked pistons and what tunes they ran. All were hotshot guys. If I remember correctly, out of 21 confirmed users with cracked pistons, 17 of them (if my memory serves me right) were running PPEI 50hp tune for their daily towing...
I also work around alot of duramax drivers. I have personally only ever met one person that had their LML crack a piston, and he used PPEI. Also said he had overboost codes with reduced power every time he towed. Built a new engine and switched tuners and no more problems.
My dad was also running PPEI 50hp tune on his LML. Went into reduced power every time he towed due to some trans code (no trans tuning). Dropped down to 0hp tune and no more issues since.
Really not trying to dog PPEI, they no more than I ever will. Just sharing my findings.
well I'll probably need a new motor, I'll look for a new tune as well. Who do people recommend?
2012 GMC Sierra 2500HD Denali
Stage 1 short block, ATI damper, Fass 150, CP3, upgraded trans, Up pipe, Down pipe, EZ lynk w/ 5 tunes SOTF, Magnaflow exhaust, PCV re-route, 4 inch Fabtech lift, 35in tires, HD motor mounts