Bleed brakes Chevy subarban 4x4

1: have someone pump the brakes while vehicle is running and in park, then hold the peddal down and open the bleeder screw until no air comes out.. this may need to be done a few times.. 2: use a vaccum pump and apply over the bleeder screw, pump the air out and tighten the screw, being careful not to let in any air...