I have a 95 Blazer.Last year I tried to engage the 4 wheel dr and it wouldnt go into 4 hi but it did go into 4 lo.Then i couldnt get it out of 4 lo!!! Finally I got it out of 4 lo.But now it says its in 4 hi but it really isnt.The 4 hi button is stuck on now.It will not do anything now.Last year 4 lo did work.The only thing i have done is try resetting it by disconnecting the battery cable for 30 min.That didnt seem to help.Anyone have any suggestions on what the problem might be and is it easy to repair??

 

first check the vacuum lines . mine did the same thing and it was just a line. and the switch thing for me was the fuse . check them all