I have a 04 SEL with Trac Control / Advance-Trac problems. In the bigginning the Trac-Control, Advance Trac, Stability Control, ABS wouldn't work and the door locks would lock and unlock occasionly when the brakes were applied. All of that seems to be working now but the light still comes on. Just looking for anyone with simular problems and or advice on how to fix it. I am on month three and three dealerships with no help.

 

Hello Troy i'm not an expert but I have read that pcm connectors get rusted they need to be cleaned and use moist repelant grease to protect them. I think there is a video on youtube on how to do this I think one connector is under the hood and other under front driver wheel maybe this could help search about advancetrac or advance trac in youtube

 

Which light is still coming on as you mention several system?