Brakes are sticking and locking up truck is being held back

Brake line on rear right where hard line goes to rubber on rear. Replaced 7"of it. No leaks now but not getting any fluid to it to bleed. Took line off at spliter block no fluid.

Thanks. But I do not have a scan tool.

I had to change my brakes on rear of truck they are disk with a single cylinder piston calipers. They were working fine all I did was change brake pads now they are sticking and getting hot. I put new clips, cleaned pins. They slide easy just when I apply brakes it does not release. So they are staying stuck. What is wrong?

Thanks Roy. I went ahead and changed my hoses seems to be working better. Thanks for reply, if something changes will get back with you.

Twice in 6 weeks, I had to panic stop, both times the rear wheels locked up.I do not have a check brake or engine light, a local ase repair shop today looked at, managed to get the front brakes to lock up, but could not determine a cause or course of action. They found no codes or trouble lights. The brakes seem to me to be not as strong as 2011 when purchased.I have had to replace ALL of the steel brake lines due to rust, late last year. All brake linings and rotors are like new. When you try to push the brake pedal to the floor, it will not. You do not seem to gain anything if you pump the brakes. At this point my best guess would be to replace the master cylinder and power booster. Any ideas or possible solutions? Any feedback will be greatly appreciated. Thanks Bill.

Hi, while driving down the road the brakes apply (you can feel the dragging, it progressively gets worse until the truck almost won't move) total distance of drive maybe 5-6 miles. You don't even have to touch the brake peddle. I got it back to the garage (the rear caliper piston seals caught fire it got so hot!Loosened the bleed screw on right rear, both rear brakes released. Then I went to the front and loosened the left front bleed screw and both fronts brakes released! I pulled the fuse on the ABS 2 years ago due to ABS operating as you almost come to a complete stop! (It is a hydroboost system)