Okay, I’m stuck. I am bleeding the breaks to my 2006 Cadillac DTS. I did a break flush, which I have done numerous times before on older cars. I realized that I needed a scan tool to bleed the breaks, after I Acquired one, I tried bleeding them and broke the bleeder screws, so I replaced both the back calipers. Now I have bled them twice, the front breaks are pushing fluid, but the back bleeders are not. I figure that I need to bleed them until fluid comes out the back bleeder screws. The odd thing is, I have absolutely no pedal once the car is started. Am I missing a step, is there more wrong that I am not seeing?

 

Souds like the master cylinder is bad I know the post is old put if you can let me know if you fixed the breaks
I am having same issues with my 04 Dts
think of replacing the abs module next
since I installed new master cylinder and still slowly going to floor