1993 Chevrolet S-10 Blazer won't go into 4-wheel drive

Had the same problem. Mine turned out to be the decoder motor.

it must be in N neutral to engage 4x4

try put in to nutral hit 2 low then put in revers back up 50 feet put in to drive pull forward and you should be out of 4 wheel

do u have a lever control on floor if yes check adjustment of linkage if u have the dash switches check fuse and relay than check actuator for proper movement at transfer case actuator has a tendency to stick lube and or adjust

this sytem is shift on the fly!! you can engage and disengage from 2wd to 4wd at speeds up to 45-50mph, 4wd lo you need to be a complete stop some cars need to be in neutral with parking brake on and some need to be in gear there all different, consult your owner manual for correct shifting pattern to 4wd lo range

Vacume lines or vacume switch on transfer case,or vacume pod to front axle.

Your blazer is equipped with a shift on the fly four wheel drive. That means that at speeds less than fifteen miles per hour you can shift into or out of four wheel drive by simply pushing the four wheel high button. If you wish to shift into four wheel low. Stop, put the transmission into park or neutral, and push the four wheel low button. Same procedure for shifting back out. Never shift into or out of four wheel low while moving. And be careful in four wheel low. At full throttle your still barely moving, you don't want to blow your engine up!

After finding a vacuum line that was off from the auto body shop that never was reconnected , after they removed it when they replaced the left side fender from a crash. Reconnected it and now it works. It was hard to find. Due to it is located below some other componets and wires.

small sylinoid on the top of the transfer case needs replaced. easy to do. it has three vacumelines going to it just trun out and replace like a bolt.

small switch isnt working right on the top of transfer case. vacome operated. replace or check the three lines that run to it