How do i engage my 4wd on my 2000 chevy blazer if the push button wont work

SOURCE: 1994 chevy s10 blazer 4x4 push button type

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.

SOURCE: wont swictch back into 2 wheel drive from 4 wheel hi

you could have a split vaccume line goin to the actuater switch that operats the 4 wheel drive under neath the battery box.

SOURCE: 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.

SOURCE: push button 4wd wont engage in 4wd

The solder joints broke on the push button's PC board at the connector. Pop out the button assembly , disconnect from wire harness and re-solder the connector pins to the PC board. Very easy to fix!

SOURCE: 2001 Chevy 4WD button lights don't come on - 4WD wont engage

check the solenoid on the front chunk these vehicles have had a lot of problems with these solenoids. have personally replaced about 10 of these on 98-02 models.