My 2003 Tahoe with the NP8 Transfer Case seems to be having trouble. It first had pump rub and sprung a leak so I got that changed out. Now whenever the truck is started the 4 button selector switch reverts to either Neutral or 4 LO. I can use the buttons to manipulate it back to 2WD and everything works and drives fine. Next time I start the truck, back to N or 4LO. It seems so odd because it never makes any noise going into 4LO, but you can sure hear the commotion coming back out of it and getting to 2WD.
Would this be the actuator motor? It doesn't seem like its the 4 button switch as they all light up on start up and they all seem to work to do what they are intended to. But shut the truck off and it's back to the beginning.
Thanks for any input, John