Ever since I connected a trailer to my 05 Tahoe the interior lights will randomly turn on and the DIC will display "Divers Door Open". Also, the heated seat will turn on as well. Anybody experience the problem before?

 

Sounds coincidental to me... Have you checked to make sure no wired are chaffed between the door and frame (the black rubber boot thing)?? It sounds like it's a grounding problem to me.