I don't mean to sound stupid, but can someone tell me what a prndl switch is verses the 4l60e neutral safety switch. Pretty sure it's the same thing but apparently not according to what I'm being told now by the people who tuned my truck. If anyone wants to hear some crazy stuff private message me and I'll give you some stories on what I've been dealing with on trying to get my new engine running and 0411 tuned correctly. Personally I'm ready to start beating my head against a brick wall.