Pedal goes to the floor no pressure even with the booster disconnected, bleeding from right rear to left rear to right front to left front, also tried to use a scan tool but wouldn't get connect to abs module, oh I'm using a self bleeding vacuum bleeding tool.
Hi I'm new here, tried to help a friend with his 2000 Serria 1500 we replaced the master cylinder and all the brake lines as they were leaking now I can't get the air out of the system, I've done this on my 2007 Serria 2500hd and bleed the system without any problems, trying to figure out what went wrong