Do you really feel you need 5 tunes, if so go that route.
I’m only a one tune guy 40hp towtune with turbo brake.
As far as having the 5 position switch, that’s out of my league, but you might have to disconnect the switch wires from the ECM, if your going the one tune route so it doesn’t affect anything.
Getting one tune for free vs paying for a vin license $125 and 5 tunes along with a AutoCal probably $1000 to $1200 + guessing.
Me, I’d go the free way to start out.
You could always go the 5 tune route later on, already having the 5dsp switch, if you want.
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, AirDog 4G100
Castrol Hypuron/Vecton 15W40 synthetic blend oil
Donaldson P550832 2 qt oil filter
2007 Yukon Denail "BLACK" 6.2 gasser
DIY stock AirBox Mod, K&N, Airaid intake, EFILive TCM only tuning
Last edited by D_R_C; 01-10-2020 at 04:17 PM.