I can get my 91 GMC s15 4x4 to get clutch pressure.

What is your question?

I replace my clutch master cylinder, when I went to go bleed the clutch no fluid came out. I kept trying for at least 2 hours, I finally got fluid to come out of the bleed valve.. but still no pressure I attempted to bleed like brakes until it was straight fluid and no bubbles but it still won't get pressure

How long has your 1991 Chevrolet S10 had this problem?

Going on 3 days