Quote Originally Posted by archemedes View Post
they have to prove the aftermarket part caused the problem, that is what the law says, some dealers will argue it, but if you get the area supervisor involved it gets fixed fast (that number is in the back of all gm owners manuals by the way)

Exactly. However, the last part of my previous post states that if you do have an aftermarket part that causes a direct failure (IE, your transmission breaks and you have a 3.4 pulley and supporting mods) and you swap it back, that is considered fraud.