dvolz

I don't know if I got this in the right forum. I've got a 2000 Siverado 2500HD (new body style). ok so my problem is this. I had a code for LF wheel speed sensor causing my "auto 4wd" not to work under 25mph. My speed sensor wouldn't read under 25mph. ok so I replaced it with a AC Delco sensor that way a aftermarket sensor could not be to blame. So now my truck has no DTC's ini it, and now if I press "auto 4wd" and move my service 4wd light will come on, and it will not disengage back to 2HI unless i shut the truck off and restart it. Anyone come across this before? Any help would be great.