Stealth Module - Chevy/GMC Duramax LMM 6.6L (2007-2010)

2009 gmc 3500

milage improved more than i thought it would, empty up to 4 and sometimes but not alot, 5 mpg more.. then i hauled around 16000lbs of hay on my 30ft trailor and there again milage improved and i could feel the extra power, nothing that would pull the truck into but more power that stock which made hailing alot better

2010 Chevy 2500hd

Great product, install wasn’t the easiest, but once it was in it seems to do the job well.

2008 Chevy 2500

So far everything works great really smooth out the transition in turbo lag