Have you tried taking the TCM tuning out, putting it back to the stock TCM.
TCM tuning is not always what a person might expect.
I haven’t yet. It’s an ez-lynk and I didn’t see anywhere to flash trans tuning specifically. If there’s supposed to be then I definitely got screwed. But I’ll take a look after work today and see if I can find it
drove mine to a muffler shop to arrange for an additional muffler.
The new exhaust system does have a muffler - of course, a "straight thru", but without the CAT & DPF, just a bit too much of a "drone". I am going to have TWO "straight thru's in series, in the hopes that gets it closer to the stock (lack of) exhaust noise.
You need a 30” resonator from FTE. That’s the only thing besides twins that will kill the drone.
Sent from my iPhone using Tapatalk
2020 GMC Denali HD CCSB L5P/10L1000 Allison 4x4
SOLD2016 Sierra 3500HD Denali CCSB SRW UDP Tunes on V2/SOTF Switch/Danville 63.5 Billet-S480FMW Billet Twins by WCFab(Illusion Blue)/Exergy 100% Injectors/Exergy 12MM CP3/Banks Intercooler/HSP Billet Manifolds/PPE Up Pipes/PPE Oil Pan/PPE Deep Trans Pan/AirDog 165 II-4G/FloPro 5" SS Turbo Back/MBRP 6" SS Tip/CTS2 Insight/EDGE EGT Probe/EDGE 0-100 Boost Sensor/Cognito 4-6/Cognito Front Driveline/Cognito Swaybar/Cognito PISK/PPE Tie Rods/King 2.5 Resis/Air Lift 5000 Ultimate Bags/Air Lift Wireless One Compressor/Wilwood TX6R Brakes Front and Back/LT325/60R20 BFG KO2s/20x9 Method 309s/AMP Steps/Yukon 4.11s/Royalty Core RC1/Retrax Powertrax Pro MX/Titan STAFS 30 Gallon/JL C5s/JL 12TW3-D4/JL VX600/6i/JL XD300/1V2
Mike L Trans (Goerend R/Alto G3s/RatioTek) SOLD2015.5 GMC Sierra 3500HD Denali CCSB SOLD2007.5 GMC Sierra 2500HD SLT CCSB SDP Twins/Mike L Trans/ATP Tunes