Changed break line but still have no pressure in breaks

Lots of video help in the link. Some vehicles have a shim kit which you have to buy as an extra part kit. Mine does.

https://www.google.com/search?q=2001+Chevy+Silverado+brake+caliper+not+releasing

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You might have a collapsed brake hose going to that side. It will be the rubber line from the caliper to the frame. You cant tell by looking at it but the inside of it might have collapsed not allowing the fluid to flow back, and only allowing it in. Ive seen this happen before.

Open and allow the fluid to flow out as there can be air lock in the tubing to the rear. so remove the tubing once again if there is no flow and clear with an air pressure.
There after connect to bleed off the front/rear in unison to remove all air lock.

That cable is the parking brake cable.

Check the hose(s) from the calliper to the tubing.
Many times they will fail internally (no leak) and act as an accumulator - keeping pressur in the line.
If you can open the bleeder, and the calliper cylinders retract, chances are good the hose has failed.
It is always recommended to replace the hoses all at once.

Thanks for using FixYa -a 4 THUMBS rating is appreciated for answering your FREE question.

I say it's the CV joints. You have to jack up under the lower A-Arm, to take the spring pressure off of it, to check them.

(Use jack stands, and wheel chocks behind the rear tires. Emergency brake On. Work on a hard level surface. Be SAFE! Trucks can be replaced, YOU cannot!)

Check the common earth connection is present at the lamp socket.

try bleeding the brakes as a system. start by making sure the master cylinder is full. then have a Friend step on the brakes and release 3-5 times. the last one they should hold as you break lose the bleeder on the passenger side rear, then do the driver side rear ,(check fluid) next passenger front and then the driver side front do each wheel until you don't see any or hear any air, thats the way i have always bleed brake systems. hope this helps

When you open the breaking system you allow air to enter the break lines and that will cause squishy or weak breaks. You have too "bleed" the air out of the lines now. The way to do this is to have someone help you with this process. They will need to pump the break pedal until the break pedal is stiff and hold pressure on the pedal while you open the valve on the caliper or wheel cylinder(disc or drum) until you have a steady stream of fluid with no air. To ensure you get all the air out you need to start from the passenger rear tire,then driver rear, pass. front, driver front. Make sure you slip one end of a hose over the bleeder valve and the other end in a container so that you don't allow the break fluid to contaminate the new brakes,