Squeaking Noises while driving

I just bought a 1991 Chevy S-10 Blazer 4x4. I just noticed it is making squeaking noises while i'm driving. It sounds like it's coming form underneath the truck. Does anyone happen to have any suggestions as to what could be causing the squeaking. Any advice would be really appreciated. Thanks

Sounds like a bad universal joint. Does the noise seem to be comming from the rear?

If it expensive to have the universal joint replaced?

If it expensive to have the universal joint replaced?

Not sure what the labor would cost. I replaced mine myself. The actual part was only $10.99.