Hello I have 2001 Chevy blazer I want to know why there is air coming out of my compressor and how to fix it

 

If you're talking about your air conditioning compressor, that means it's leaking. How to fix it depends on where it's leaking from. Most likely, it needs to be replaced, but there's a lot of other work and specialized equipment involved. If you don't know what you're doing, you'd be better off leaving it to a professional.

 

Or if more than likely your talking about a smog air pump it's prob a blown line / hose

 

Good thinking. I don't have one of those so, that didn't occur to me.

 

Can you post a pic of where you have air coming out?