Hello,
I have tried everything I can think of and have looked through every forum and can't figure out why my DFCO isn't activating.

Vehicle is a 2012 GMC Sierra with 5.3 BTR Stage 3 Truck Cam and DOD and VVT delete.

I have adjusted my Cylair parameter to accommodate for the larger cam but I can't get DFCO to activate, regardless of settings, unless I pull it down into 4th gear manually. Is this a common issue?

Any help would be appreciated. Cam Tune V1_85.hptCam Tune V1_85.hpt