Stuck in 4 wheeldrive

Could be the servo on the front diff not activating. Could be a power prob or failed unit.

If your truck has a dashboard push-button 4x4, then carefully disassemble and clean with Q-tips and alcohol. when 4x4 lights turn off, drive in reverse over 15 feet. Good luck.

My GMC Jimmy '01 would slip from 2-wheel to 4-wheel drive while I was driving. First time it happened my mechanic replaced a small part. This last time, he couldn't find anything wrong so he popped the 2-4 out and disconnected the 4-wheel drive. Now I don't have the problem.

I own a Jimmy and have done quite a bit of 4 wheel drive repair on it.
The first thing i would check is the 4x4 selector switch. I know for a fact that these will throw a service 4x4 code if they are unplugged or shorted. They sell for 50-60$ or you may find one at a local salvage yard for cheaper. Taking this out and checking it only takes a few seconds, just simply pop the switch out of the dash with the edge of your pocket knife. After you get it out theres a few more tabs surrounding the back plate, and this is where the circuit board is located. I would inspect it visually to make sure nothing looks corroded and also take a sniff of it to insure there isn't a burnt smell. If it were the 4x4 actuator the lights would still illuminate on the selector switch, it just wouldn't engage the 4x4. You'r problem is all electrical trust me .

If its a push button 4x4 take it to the shop its a VERY COMMON Problem dealing with the electric.Once you pay the $400 to get it fixed get rid of the truck and settle for a Jimmy/Blazer/Bravada with a floor shift 4x4..GM had problems with the push button 4x4.DONT DRIVE YOUR TRUCK IN THE MEANTIME.YOU WILL BLOW YOUR TRANSFER CASE RIGHT OUT OF IT!

have the transmission checked out, it sounds like its stuck between gears on the 4x4

have a 1998 gmc jimmy stuck in 4-wheel low. the button clicks, and the motor underneath makes noise like it wants to desingage but does not.

Have you tried this: put it in nuetral and push on the brake! Then as your doing these things push the 2 wd button!

when can you engaged auto 4wheel drive and how long can you run it

i found the problem it was the acuator on the side of transfer case so i took it off and manualy put it in 2 wheel drive now all i have to do is get under there and turn it with a tire iron thanks but got it under control......