Stuck in Lo Range and Won't Shift into Park

I'm late in replying to this, but when I did the CDL conversion on my 03 the battery got low at some point and I had that exact same behavior. I had that gear warning light in the cluster and couldn't get out of low and couldn't shift into park. I read in a few forum threads that a bad battery could do that and I was sceptical at first, but it ended up being the case.

did you remove the solenoid on the transfer case while you were in there? sounds like that could be your culprit

certainly check battery first as that's the easiest

I solved the "Park" problem. The c-clip wasn't installed correctly on the shifter cable.

I have removed the solenoid and still can't get it out of low range.

must have something that is bound up
did you button everything up already? if so pull the boot off and see if you can get enough of a view down there and make sure everything is still connect as it should be.

otherwise you may be pulling it apart again to inspect