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I just recently experienced this same symptom, although our causes may be different. In my case, the slide bolts had come loose and fallen out on my front left tire! My caliper wasn't being held in place when I applied the breaks and was wobbling around on my rotor (thankfully, I caught it before it caused any damage). I bought new bolts and pins, lubed up the pins and made sure the bolts were on there nice and tight. It's been 2 weeks and I haven't experienced any more problems... *fingers crossed*

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Q: What would cause a knocking noise when pressure is applied to the brakes?
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What causes a knocking sound when the brakes are applied?

Most common cause would be a loose brake caliper mounting bolts.


What would cause a knocking noise when you use your brakes in the car?

Typically, a knocking noise when to use your brakes in the car is caused by your brakes wearing down. This means you need to get them checked out and repaired.


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Why do the brakes on your 1993 Chevy suburban build pressure then lock up?

If the rear brakes are drum brakes, then there could be a leaky wheel cylinder. The wetness inside the drum will cover all the brake shoes and parts and cause the wheel to lock up when applied. The build of pressure could be due to the wheel cylinder leaking and causing a pressure loss, but rising when the brakes are applied or pumped up. This may/may not be your case, but definitely worth checking the rears.


Why does steering wheel vibrate when brakes are applied?

This is probably due to worn brake rotors on the brakes, if there is no vibration when driving then this will be the cause.


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worn brakes could be the cause or check the A frame bushings


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No you lose air pressure .


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Why are your lifters knocking in your 1996 Chevy Cheyenne Vortex 350 5.7L 3500 ton truck?

The most common cause of lifters knocking is low oil pressure.


Why does my car shake when brakes are applied?

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Your vehicle is equipped with abs and anti lock brakes, when applied hard enough the system interprets it as a panic stop and pulses the brakes to prevent lock up and skidding.