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Does it squeek? Or is it grinding? Possible sand/ gravel trapped in your brakes. Or you need some new pads. If it's during winter and you break hard and start sliding.. then it would be your ABS kicking in.
hard breaking or no back brakes. also, back brakes adjusted wrong.
If brakes are squeeking and you are low on brake fluid Probably time for new linings or pads, I would check them before just adding brake fluid. Brake fluid resevior should be located on firewall on driver's side
anyone in there right mind would not to remove breaks on a car. Really!!
you brake shoes might not be seated right, or they might need to be replaced i would take it to a jiffy lube of a just brakes and get them to go over your brakes
if back brakes are drum i would think they are worn out not allowing pistons in wheel cylanders to return. also could be valve in master cylander.altho that would cause all brakes to lock up. if disk brakes your calipers need overhauling or replacing
in VW's when you have the breaks adjusted out too far they tend to grab when reversing. There is an auto adjuster in the rear drum to keep your rear brakes adjusting. If the brakes are worn out they will "hang up" after reverse and cause squeeling.
i would say you need to replace brake pads and clean drums and rotors with a good brake cleaner, also if pads are of a metal compound, you will never stop then squeeking if they squeek when released i would check that brake calipres and cylanders are not sticking, which does not allow brakes to release properly
Same way you would clean rotors that don't squeel. It won't fix your noise problem if that's what you're going for. Also, if you have to ask this question you probably don't have the skills needed to take apart and service your cars brakes, remember this is a system that has to perform flawlessly or someboady could get killed. Frequently brakes squeek for several reasons and a build of dust or dirt isn't one of them.
You would adjust the brakes on a vehicle with abs brakes the same way you would adjust the brakes on a vehicle without abs brakes.
The rear brakes on your suburban are the most common of all G.M brakes. You should be able to find a diagram in any Chiltons manual.What I would recommend not trying to replace them until you learn how to spell BRAKES!! Make sure you know what drum size your dealing with also if they can't be turned.
A bearing, bushing or other rubbing surface has worn or dried out, or the brakes have worn down to the wear sensor. Either way, it's not a good thing. If the noise changes pitch when you touch the brakes, it's probably the brake wear sensor, get the brakes fixed right away. If not, it could be a dry wheel bearing, U-Joint (if your car has them), serpentine belt or who knows what else. Try to localize the sound. See what's causing it. Noises like that shouldn't be ignored.