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Old 08-05-2015, 02:25 PM
 
Location: Cary NC
1,056 posts, read 1,742,205 times
Reputation: 2461

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My teenage daughter has a 1999 Chevy S10. It belonged to her grandfather and despite the age only has 39,000 miles. We had new brake pads put on a year ago. They have squealed when she presses on the brakes since the beginning. I thought maybe they just needed to break in but after a year I took it back to the shop. It is out of warranty so I paid 50.00 for them to check them and they sanded the pad. It is still squealing, I will take it back again but just needed some advise on what could be causing this problem
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Old 08-05-2015, 08:12 PM
 
Location: San 'Tone
302 posts, read 1,158,413 times
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Where did you have the pads installed? Dealer or independent? Were they OEM equivalent or lower cost aftermarket? Were the rotors machined at the time of pad replacement?

Reason I asked these questions is because the first thing to come to mind is that the pads may have been replaced with ersatz components.

I saw this a few times as a dealership technician. Aftermarket pads, especially those of low cost which offer replacement warranties have higher metallic content than OEM. So they wear more slowly. The problem with that is it also causes
squealing.

Also, if the rotors were not machined and finished with a non directional hone, the pads are having to burnish in against a hardened and polished rotor surface which lessens the likelihood of seating in properly and "glazes" the pads.

Sanding the pads, or "deglazing" is giving them a fresh surface to burnish in. If they were "cheapy" pads, they will always squeal. If they happen to be OE pads, the deglazing may very well resolve the issue. (Probably not the case here since you say they are still squealing?)

Upon sanding your pads, I'd hope that your technician also inspected the retaining clips and re-applied anti squeal compound to the back of the pads. Those can also be contributors.
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Old 08-05-2015, 08:19 PM
 
Location: Cary NC
1,056 posts, read 1,742,205 times
Reputation: 2461
It was an independent and I don't know what type pads but you have given me lots of good questions to ask them when I take the car back.
Thanks!
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Go Back   City-Data Forum > General Forums > Automotive > Brand-specific forums > Chevrolet, Cadillac, Buick, and GMC
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