97 blazer 4WD don't work

I have a 1997 blazer, 4door, 111K miles, when I hit the 4wd hi or lo button, they light up but the 4wd don't engage? Can anyone give me any possible problems?

What transfer case?
Have you checked for codes?

I have a '97 blazer with the same problem. when I push the 4wd button the front drive shaft locks in place but, the both front wheels still turn free. where can I find the codes on the transfer case?

I have a '97 blazer with the same problem. when I push the 4wd button the front drive shaft locks in place but, the both front wheels still turn free. where can I find the codes on the transfer case?


Sounds more like a vacuum problem. Have you check the actuator under the battery?

You need to start your own New Thread.
Then give all info starting with what transfer case you have and what the shift button lights are doing.