Took the truck back to dealer twice to have the system checked because of notice on DIC to check trailer brake system. Well after the dealer reprogrammed the system twice I hauled yesterday and its doing the same thing again. Dings and DIC message of check trailer wiring, irritating as hell anybody experiencing this?

Its almost guaranteed to be a problem with the brakes on you trailer.

Seach the IBC on this site . . . Not highly regarded . . .

Mine works perfectly with my Featherlite car trailer. The boat is a non-issue, as it is surge brakes.

The ONLY time it has given me an error message was when the lights were replaced on the trailer. The shop soldered some connections and accidentally had a drip of solder cross between the brown (tail lights) and yellow (left turn). It would back-feed the brake system when the lights were on. Kept giving me the message. Fixed the trailer, and all was well.

I have seen several threads here of people having issues, but I have not had any legitimate ones. My dad has the sister-truck to mine. Same exact rig, but with 6.0 gas. He has had no problems, either.

FWIW, no issues on mine in 2 years I've owned it....

Seach the IBC on this site . . . Not highly regarded . . .

Not IMHO... I think it is the best trailer brake system I have ever used. OP - check the wiring on your trailer; I'd be willing to bet that's where the problem is.