2003 chev silverado rear brakes has no brake fluid going to them . I change brake clabor can not get brake back up.

Hello Patricia,

Have you checked the master brake cylinder reservoir for brake fluid loss?

I don't suspect the master cylinder as you have replaced it... but am more suspect of a leaking brake line or fitting which should have
been discovered when you had the system bled.

The only time I ever had a rear brake problem with a 2500 series Chevrolet was due to seized rear brake caliper guide pins...as your calipers are also new that is not your problem.

If your brake pedal feels spongy and travels to the floor board you have air in the system, a brake fluid leak or a failure in the power steering system, such as a broken hose, broken power steering pump drive belt, or failed pump, would result in a loss of pressure to both the hydro-boost and steering.

Find more information here:

. Hydro Boost Power Assist Systems Operation Diagnosis and Repair

Try bleeding the lines, That may be what it means by service

Loosen the bleed ******* off 1 at a time , if no fluid comes out the nipple is blocked clean them or change them .

FIRST REMOVE SMALL AMOUNT OF BRAKE FLUID FROM THE BRAKE MASTERCYLINDER. THEN USE A LARGE C - CLAMP AND LEAVE THE OLD BRAKE PAD IN PLACE ON PISTON SIDE THEN COMPRESS THE PISTON IN CALIPER BORE. IF YOU SEE SIGNS OF BRAKE FLUID LEAKING AROUND PISTON SEAL.THE BRAKE CALIPER NEED REPLACING.WHEN YOU FINISH BRAKE JOB NEW BRAKE SHOES IN PLACE MAKE SURE BRAKE MASTERCYLINDER COVER BACK ON MASTERCYLINER THEN PUMP BRAKE PEDAL UNTIL NEW BRAKE PADS SEAT AGAINST BRAKE ROTOR.CHECK BRAKE FLUID LEVEL IN MASTERCYLINDER MAKE SURE ITS NOT LOW.

Try opening a front bleeder and depress the pedal ALL the way,should feel a light "tic" as it reaches the bottom,close the bleeder and try to bleed the rear again,but instead of pumping ,just take the master cover off ,open the rear bleeders and wait 10 min or so for the fluid to gravity bleed out the air. Thinking the proportioning valve is tripped so no fluid is allowed to reach the rear,opening the front should reset the valve . If there is alot of air the valve will just trip again if you pump the pedal,hence the gravity bleed.

Sounds like the caliper is seazing up, Normialy if you have air in the lines the break peddle will go to the floor.

first you need to check the rear brakes ,the emergency brakes work off the rear brakes, there is an adjustment on the center of cable that goes between both rear brakes,hope this is some help,thanks robert b.

Have someone push & release pedal while at wheel with problem. See if it takes a while or slow to release. If yes, have wrench ready on bleeder screw, and try again, if it sticks/holds, crack bleeder screw, if it releases, I'd replace hose.

I have a 2002 Chev Cavalier that had the same exact problem. I replaced the bulb harness (purchased from a chevy dealership for around $5) which was fairly easy to do. I have had zero problems with it since.