Going Kennedy you have to remove your ECM and ship it to get tunes loaded on it, then it gets shipped back with tunes, re-install your ECM, you truck is down during this time.
AutoCal tuning most of the tuners send you a AutoCal with tunes loaded on it, plug and play downtime maybe 5 minutes.
Pretty much everyone that has Kennedy tunes are happy.
If you need any changes with your tunes even tire size changes, repeat above.
With AutoCal any changes you call the tuner they’ll email you the changes, you load the changes on your AC then plugin and play.
I think Kennedy started doing tunes thru email providing you have a AutoCal and a vin license, this you’ll have to check on prices.
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
Last edited by D_R_C; 01-25-2019 at 09:27 PM.