However, I thought the new overhead flash was supposed to indicate when the truck is going in and out of regen and mine doesn't.
No, the reflash expands the type of messages you get if your DPF starts to fill up but it does not show routine regens.
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2007.5 2500 QC 4x4 6.7L, 6 spd auto, 3.73 gears, Westin Brush Guard, 2" level kit, rear air suspension, 65 gal Aero fuel tank, Commander gauge set, RedsBeds toolbox/tonneau cover,Franktown, CO