I replaced the rear pads and rotors on my brothers s10.. on one side i replaced a seized caliper as well.

i bleed the brake line on the side that i replaced the caliper, there is no more air comming through the line, but when i start up the truck the pedal is still sinking to the floor.

my question is that now that i have started the vehicle is the air in all the lines now? will i have to bleed all the lines? I would have just checked for myself but the problem is that the valves on all the old calipers are rusted to ****..

so i would like to know if that is what happened and im going to have to try and bleed them all or if that is not possible and something must be wrong with the side i replaced.