2000 GMC Sonoma Brake Squeal

GMC SONOMA
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2000ZR2
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  • 2 POSTS
I replaced the brake pads and rotors on my 2000 GMC Sonoma with the cheapest pads they had and didn't like them because they squealed whenever the brakes were applied. I have since then replaced them with the expensive ceramic ones and I still have the same problem. I have also tried spraying the back of the pads with the no squeal spray. What could be causing this problem. Thanks.
Mar 29, 2006 at 8:44 AM
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LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
The squeal is not really a squeal but a resonance between the rotor and the pad. You need to get some OEM anti squeal paste and apply it to the back of the pads where they contact the calipers. Make sure all the anti rattle clips and shims are in place-- Good luck you have a 60/40 chance it will work.
Mar 29, 2006 at 9:03 AM
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Suggested Repair

Apply OEM anti-squeal paste to the backs of the pads where they contact the calipers, and confirm that all anti-rattle clips and shims are installed.

Conversation Summary

The owner of a 2000 GMC Sonoma replaced the brake pads and rotors, first with inexpensive pads and then with ceramic pads, but the brakes still squealed whenever applied. Anti-squeal spray on the pad backs did not help. The expert explained that the noise is resonance between the rotor and pad, and recommended OEM anti-squeal paste on the pad backs plus checking that all anti-rattle clips and shims are in place, noting about a 60/40 chance of success.

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