transmission

I just bought a 2003 Tahoe and the kid that had it before me had AI guess one hell of system in it so now I had no power going to my training like there's no power going to it all what do I do what's going what do I need to do I mean is it a groundwire or what do I need to do to fix it

Hi all, I am having some issues with transmission in my Subaru, and it's actually been a problem since I've had my audio system installed, I just didn't think it was due to the aftermarket audio system (I replaced valve body and have done countless fluid changes, had it diagnosed by dealers and...