P0504 and U1055 codes Brake over ride failure-Little help please

First time this happened.. also when I turn truck off it will do at least like 5 cycle checks and totally start tripping out like it lost comms with everything.

 

Posting your Truck info (year, engine size, 2wd/4wd, transmission, and trim package, etc) would greatly help in getting started diagnosing your problem.

 

I'd start by checking all your connections on your remote start installation, I'm betting you may find your problem there. I've also attached the diagnostics guide for the p0504.

 

This! ^^ Was this starter installed with vampire taps of an actual harness?

 

That's good; definitely a lot less chance of things going pear-shaped, but these trucks are funny about remote starters at the best of times...