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Brake pedal to floor

Brake pedal to floor

Postby tshaljr [OP] » Jul 03 2012, 2:55am

Just bought my 2003 Silverado 2500HD 4x4. Brakes feel real good until slowing to about 2 mph. At that point, the brake pedal moves towards the floor. Still stops the truck but it is an uneasy feeling. What could this be? Do the brakes need bled?
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Re: Brake pedal to floor

Postby Carmelsteve » Jul 03 2012, 5:15am

Sorry, but I gotta ask-didn't you notice this when you test-drove it? Seriously, though, if you don't know enough to know what it is, you should have it towed to a shop. Please don't drive it anymore- it could fail at any time and injure someone. Just my opinion.
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Re: Brake pedal to floor

Postby ASTE25 » Jul 03 2012, 7:51am

Most likely it is the ABS sensors (on the front brakes). They are known for getting corroded on your year truck. The symptoms are exactly what you describe. You can try taking them off and cleaning them, but I would just reccomend getting new ones and replacing them.
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Re: Brake pedal to floor

Postby tshaljr [OP] » Jul 19 2012, 2:53am

I replaced the passenger side with a new sensor because it feels like that is the one that is releasing at low speed. However, I still have the problem. Could it be the driver's side or could there be something else wrong with the passenger side? Thanks for your reply.
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Re: Brake pedal to floor

Postby AngryRussell » Jul 19 2012, 3:01am

I'm a big supporter of "if it has two, replace them both"

I wouldn't feel comfortable replacing just the one side as I'm guessing the other one will fail too.... if it hasn't already.

Do the pair at the same time and see what the results are.

Angry Russell
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Re: Brake pedal to floor

Postby ASTE25 » Jul 19 2012, 3:09am

^^^ what he said, only happier, not angry. lol.
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Re: Brake pedal to floor

Postby mikewayne » Jul 20 2012, 11:50am

Brake system is the most important part of your vehicle and failure in them might be really costly. Until and unless your brakes are working fine there dose not seem to be a real trouble but the uncomfortable feel of brakes being floored might be due to air leak in to the braking system, or the brake shoes might be poorly adjusted, or the pressure checking valve might not be working properly.
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Re: Brake pedal to floor

Postby RNGRDVE » Jul 20 2012, 2:03pm

There are 2 common causes to this one is loose ft hub bearing. To check jack up ft end shake wheel back and forth to check for play, if there is none then it is the sensors. I would recomned replacing both, make sure when you replace them you clean the hub where the sensor bolt down and apply thin layer of paint to prevent further rust. also it's a good idea to apply a small amount of bearing grease or something similar to the end of the sensor. You can remove the ABS fuse under the hood to temporarily eliminate this problem until you have time to fix.
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Re: Brake pedal to floor

Postby tshaljr [OP] » Jul 26 2012, 3:05am

Where would the ABS fuse be under the hood?
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Re: Brake pedal to floor

Postby ASTE25 » Jul 26 2012, 3:17am

It's either going to be in the fuse box under the dash or in the power distribution box under the hood. Your owners manual should have a legend to both boxes in it. If you do not have an owners manual you can download on at the bottom of the home page of this forum.
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