Have a 2002 blazer(not zr2) lights on the dash works fine but 4 wheel drive dont engage. I went wheeling and suddently 4x4 didnt work no noise nothing.Can someone help me.

 

This topic has been covered in many posts.

You need to determine if the transfer case is not shifting properly or if the front axle is not engaging. To keep from repeating things, please try some searches and ask back if you still have questions.

 

sorry abouy the double tread. Found the problem nothing to do with not shifting or front diff. The vacuum line was leaking. Yes i went thru all your reply thanks. thx for helping.My blazer runs in South Africa and its doing realy good here in the mountains.

 

Glad you found your problem. If you had a vacuum leak, it was causing the front axle not to engage.