2000 Blazer stuck in 4WD

The first thing I would look at is the shift rod on the transfer case. If I remember correctly, it is on the drivers side and is a rod aboutsix inches long and has two ends that basically pop into rubber gromets. If that rod is bent in any way, or has come loose of the gromets, it will not shift into or out of the four wheel drive. If yours has electronic four wheel drive, the electric acutator could be out or going out. you should be able to remove the rod and simply move the switch by hand on the transfer case. It will get you out of 4 wheel drive until you have the ime to diagnose the electronics at least. It has happened to both my 1994 and 1999 S-10 blazers.

DO THIS FIRST !!!!!
I went through 2 days of troubleshooting why my 2001 Blazer was stuck in in 4L (push button). I was about to push it off a cliff when I had realized that the only thing I DIDN'Tcheck was the buttons themselves. Turns out that they are made not much different from a computer keyboard. Pop out the 4W button panel from the dash and hold it face down in your hand. With a small screwdriver, pop out the back from the front. MAKE SURE YOU KEEP THE FACE DOWN IN YOUR HAND or else you'll have buttons all over to pick up. Now, once you have the back seperated get a q-tip and rubbing alcohol and clean the back of the buttons, which are metal contacts. Then, clean the WHOLE board where the contacts make contact with the q-tip and alcohol . Even if this assembly does not look dirty to the eye, it will malfunction with the slightest of oxidation or moisture deposits on the board or the contacts. Also, I may add; throughout my troubleshoting adventure, I also was able to get the tranny to shift smoother by cleaning the tranny's computer connector. My computer was located at front pass right side floor panel. It was obviously exposed to a lot of moisture somehow. The power pins were especially bad. I hope this helps.

One common problem i have seen on the s10 blazer is the small vaccum switch on top of the transfer case leaking by and keeping it in 4wd after being comanded into 2wd,its relativly cheap and the dealer should have it in stock,i have replaced ALOTof those switches,and a 7/8" box end wrench will remove it if i remember correctly,hope this helps

I HAVE BEEN TRYING FOR 3 DAYS TO TAKE MY transmission out to replace my clutch i have taken every thing i can find to drop it but there is something still holding it in place is there somthig i am not doing

Were is actuator switch and the number on 2000 blazer 4x4