Can you bypass the abs system in a 2003 Chevy s10 4.3 liter

Try cracking the bleeder screw and blowing a quick blast of compressed air into the screw. You might have to do this to both rear wheels. Try one and see if you get fluid out of both first. Then of course completely bleed system. Did you run totally out of brake fluid while driving? Or did you replace a brake line?

Bypassed the abs. Run new line from proportion valve to rear brakes. Now tried to bleed rear brakes and nothing comes out. Aslo put new pads on back

Read my earlier post. Blow air in from back. Yes it works.