2001 - 2004 Duramax EFILive DSP5 SwitchLB7-DSP5-S
I've had my LLY for about 3 years now I knew it had a tune but was unaware it had 5 different levels until i called and checked on my tune.
I installed the switch and wow !!! My truck is a beast now level 3 has net me almost 24mpg highway and I'm beyond impressed. If you have a Duramax this is the place to go for tuning.
WHO IS THE TUNER/CALIBRATOR
PPEI, also known as Power Performance Enterprises, Inc., is led by the business owner and lead calibrator/tuner Kory Willis. PPEI began calibrating/tuning back in 2008, specializing in Diesel Performance but has since expanded into the Gas and Powersports industries. Kory and the team at PPEI have set many world records along with continuing many industry “firsts”. We take pride in knowing that Kory not only prides his work, but also thoroughly enjoys setting expectations high for our team so our customers can have the best products available in the world.