Possible high EGT’s when tuned is the reason we suggest having a EGT gauge, depending on the hp tow tune you have could be the reason on the high EGT’s.
What you need to do is let off the throttle a little to drop the EGT’s, they won’t drop on there own.
It might be a good idea consider switching to a little lower hp tune and see what happens.
I know Kory tends to add a little more hp on his towtunes than most of the other tuners do now.
My heavy towtunes are rated @ 30-40 hp, very seldom do I ever see 1350, but if I do I’ll let off the throttle a little.
13,500 lb 5th wheel, truck close to 8600 lb ready to travel loaded with driver and riders 60 gal aux fuel tank, lots of 7-9% grades.
About 8 years ago 60hp heavy tow, 80-90 light tow, NOW most are in the 30hp range heavy, 60 light.
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; 07-24-2019 at 08:46 PM.