Mileage gains for me 0.
If you only looking for mileage gains, I think youíll be disappointed, I know I was.
Heavy tow tunes approx 30-40hp, I do have motor ops heavy tow tuning, Iím currently running ATP.
I have 4 different EFI tuners tunes all heavy tow, no difference with mileage all the same 0 gains.
2007.5 GMC Sierra 3500 SRW L.B."BLACK" C.C. 4X4 LMM Z71
DIY stock airbox mod, aFe ProGuard 7, OEM drop-in
EFILive ECM ATP - Heavy Tow Tune with Turbo Brake.
EFILive TCM Duramax Tuner
DHD Cold Side High Flow Intake Pipe
DHD PCV Re-Route
2007 Yukon Denail "BLACK" 6.2 gasser
DIY stock AirBox Mod, K&N, Airaid intake, EFILive TCM only tuning