4 wd defalts to 2 WD

I think you have a problem with the transfer case actuator. Have you been driving on dry pavement in 4WD?

So, I have gotten the vehicle into rwd by pressing the buttons in the order I described. When the button is lit up 4wd it is definitely in 4wd. After I push auto then 2wd, all the lights will flash and go back to lighting up the 4wd. I have to do that sequence 3 times. The last time all the lights will turn off. I live on a gravel road so I tested a couple of times and when the lights are off the truck does spin the rear tires with the front tires not grabbing. When the light is on and I spin the tires, all 4 grab and go. Is that what you are asking? The front end does bind on dry pavement if I just move the truck a few feet and don't go through that process. But if I go through the button process, when all the lights go out, the front axle is free and doesn't bind.

I have had what I believe was 2wd, then I took out the fuse for the computer so that it couldn't "re-engage" the 4wd again. The transfer case motor that is on there is 16 months old. I had to replace it in 10/17. It worked fine, and when that motor was bad the code that came up in the scan tool was for a transfer case motor. Now the code is different, it is reading a bad computer. So I put in a new computer and no change. I live in snow country. So the 4wd is nice to have. I emailed Advance auto parts a "nice" email, where I got the motor about how it should last longer, and today they approved to exchange the motor under warranty even though it's more than a year old. Hopefully I will get to it sooner than later cause the bottom is going to fall out on the temperature and the highs are going to be 0 degrees...that is Fahrenheit.

I figured I would give an update. I ended up putting a new transfer case motor in today. now the truck will shift from 2-wheel drive to 4 high. But it will not go into 4 low. Thank you for the advice.

I'm having similar.issues but mine won't come out of 2low. Ever since I got stuck on a stump I can turn my wheel extra long to turn the left tire. It squeaks. The rest of the cars chill but I think I may have bent an axle arm? Any advice. Havnet gotten my stimulas so I don't have cash to replace transfer case motor