I might not have explained it right as I'm a noobie. my truck switches into 4h just fine. I hear the system click and switch into 4h from 2h no problem. While in neutral I push 4l and it just blinks. On my dash my gear shifter is stuck. It looks like this with the ! representing where the gear indicator has always been stuck.
P R N D D
It has been since I've had it. It has a rebuilt tranny and I think it's a E4OD. I could be totally wrong, and I'll look through all my trucks paperwork to make sure I'm right.