1991 chevy caprice brake problem

Replace the turn signal switch.

You need to add BRAKE fluid. After that, blead your brakes. You need to find out where the brake fluid went. If there are no leaks, you need to check the remaining life on all four brake sets. If you have no leaks, chances are pretty good that you need new brakes.

either a fluid leak or a bad master cylinder. check fluid level first and check for brake fluid around the lines.

sounds like you may have a leaking rear wheel cylinder. Once you remove the drum you should be able to see if it is leaking.

If its leaking enough for you to see it on the back of the tire than the brake shoes are probably soaked as well and will need to be replaced.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Hi and welcome to FixYa!

Few things too look at. Here are the following:

- The brake pistons may have leaks that's why when brakes are applied it will floor but won't stop. You will have to have it replaced.
- The brake booster is faulty. If the brake booster is faulty same result will happen
- Brake fluid is out. Try to fill it to the right level and it can resolve the problem

The following will surely need replacement to resolve the problem.

Hope this helps and thank you for using FixYa! Have a good one!

start from the fartherest place from brake master cylinder, that will be the rear passenger side wheel. it takes two people to bleed brakes. you will find the bleeder valve screws at the top of inside of the rear drums on both rear wheels, have someone pump the brakes up, will take at least 4 pumps of brake pedal, at 4th pump keep pressure on pedal while you break loose the bleeder valve on the rear wheel, fluid will come out and brake pedal will go down to floor, keep pressure on brake pedal until you've tightened the bleeder screw back [note] you'll only have to back the bleeder valve out about a half turn until you see the fluid come out. after you've done the rear brakes add brake fluid to the master cylinder as it will be low. then go to the front passeger side and you will find the bleeder screw on the brake caliper. repeat the same proceedure as back. remember that pressure on the pedal is a must until you've tightened those bleeder valve screws back or else it will **** air into the brake system. suggest that you bleed all 4 wheels not just the back. after you've bled the front make sure you add more brake fluid back to the master cylinder, it will be low again. hope this helps and thank you for choosing fixya.com

did you work on the rear brakes

check brake pads

Sounds like you have a bad brake cylinder or line on one of your brakes. Check for leaking brake fluid on the inside of all tires. If wet, pull tire and check whre the fluid is leaking from.

First check your brake fluid.
Either you have a failing brake booster, or you have developed a leak in one of your brake lines. If your brake line is leaking, it should be pretty evident, i.e. oily looking substance sprayed underneath the vehicle or in the wheel wells, if the booster is leaking (the large black/silver almost bowl shaped thing directly in front of the driver under the hood against the back wall) there will most likely be fluid dripping down the firewall below it, if your brake fluid is extremely low/empty, you probably have a leak, that could be at the booster or on a line, or even at the caliper/drum. If it is empty (which can make your ABS light, light up) then you have yourself a leak. Also, if the fluid is really low, you could try adding some, although you will have air in the lines if it was low enough to floor the brake, but you might be able to find the leak if you refill the fluid and cause it to spray from the leak again. Have someone watch under the vehicle while you do this.