Well I got a 91 Silverado and have gone thru too many nv3500s so I went on craigslist got a 93 4l60e 93 wiring harness and ecm installed everything and my reverse lights stay on.is this because I got the steering column in it from the standard truck.do I have to have the column shifter?BTW it was a bad craigslist deal won't even spin the tires jacked up