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Old 10-04-2017, 03:58 PM   #1
Sixball
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Spongy Brakes 95 1500

I just picked up a 95 1/2 Ton Silverado. ABS light is on, and the brakes are spongy. It stops fine, and on the drive home when I stabbed them, the rears momentary locked up, I let off the pedal and the brakes released. The BRAKE light come on once in awhile but only for about 45 seconds or so. Full of fluid. Where should I start looking? Thanks
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Old 10-05-2017, 06:26 PM   #2
Tom
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Re: Spongy Brakes 95 1500

Master cylinder.
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Old 10-07-2017, 11:03 AM   #3
abig84
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Re: Spongy Brakes 95 1500

if your new to these kinda trucks the brakes were always kinda spongy on them. my 1990 had everything replaced a few years back and you still dont ever get a perfect brake pedal, same with all the ones i ever worked on.

but hard to tell if you have other issues, poorly adjusted rear drums, bad master, air in system etc
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Old 10-07-2017, 04:39 PM   #4
Sixball
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Re: Spongy Brakes 95 1500

Quote:
Originally Posted by abig84 View Post
if your new to these kinda trucks the brakes were always kinda spongy on them. my 1990 had everything replaced a few years back and you still dont ever get a perfect brake pedal, same with all the ones i ever worked on.

but hard to tell if you have other issues, poorly adjusted rear drums, bad master, air in system etc
Yeah, I'm familiar. I have a 94 GMC Sierra 1500. It was my daily for almost 4 years. It's 454'd and just a toy now. Anyway, I switched out rims / tires today on the 95 Silverado and the drivers side rear drum was wet with fluid along with the back of the rim. Master is still full, no puddle, just wetness. I'm guessing this is the cause? Maybe some air? I didn't have time to look further today. Thanks
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Old 10-07-2017, 08:52 PM   #5
Kudzupatch
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Re: Spongy Brakes 95 1500

Wheel is wet of the brake drum is wet? If the drum is wet, you probably have a leaking wheel cylinder and need to replace it ASAP.
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Old 10-07-2017, 09:04 PM   #6
Sixball
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Re: Spongy Brakes 95 1500

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Originally Posted by Kudzupatch View Post
Wheel is wet of the brake drum is wet? If the drum is wet, you probably have a leaking wheel cylinder and need to replace it ASAP.

Both. Yeah, I know it needs serious attention. I'm not driving it anymore. Just didn't have time today. Hopefully that is the only issue that is causing the spongy brakes.
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