Zot W

Went thru this list of (23 NA 149 & found lots of engines except 6.6L Gas. Maybe I missed it, but the fixes were eliminating wear & grounding of wiring in the engine compartment. Couldn't find similar conditions along the wiring to or from the RV plug or controller areas. Ours like those getting the DIC check trailer wiring message etc. Varies when & where. Metering the plug & socket shows various conditions. One regular "cause" but not always, is slowing coming into a small town. The 1st-3rd braking will pop up the DIC warnings. Then jumping out & chasing that rabbit (shaking the, plug, repluging, measuring voltage in jbox, any touching the circuits) causes it to go away or sometimes come on. Never long enough to track it down. Replaced the plug, cleaned everything. Started about 2k miles ago & fails mostly going down a grade. But also happens going up hill or on the flat @ any speed 2020 denali, & 2020 keystone cougar bumper pull. 47,k on Denali & 60k on trailer.