I blew a brake line from the box under the master cylinder and goes to a box behind the transmission on my 04 chevy Silverado 4x4. So it sat overnight and I fixed the line but now I have no pressure at all. They don't even pump up enough to bleed them. I'm confused and could use a little help.

 

If it is one of the ABS related lines, to bleed all the air out you MIGHT need a ODB2 scan tool that has the ability to command the ABS solenoids to open up, so that you can push all the air out of the system to do a proper brake bleed.

 

I figured it out haha. I just unscrewed all the bleeders and just let the fluid drained down, then I bled all the brakes starting with the passenger rear, then driver side rear, then passenger side front and ended on the driver side. They work great.