So i recently got a rebuilt transmission for my 2014 Silverado. installed by a buddy of mine, got it programmed by the same guy i bought the transmission from. I get it back the first day, no issues whatsoever. The 2nd day, my truck shuts off for a split second, displaying CEL, Stabiltrac off, Service 4wd, Brake assist messages THEN comes back on. I notice it happens when i hit a big bump, not sure what it could be. I was rear ended about a month ago ( not much damage) but i’m kinda lost as to where to look… It’s throwing a loss communication to TCM code too.