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Squealing Brakes on my 2018 Enclave - What's going on?

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Eric V. · rep 0 · May 22, 3:49 AM · 1 replies · solved · Question

Vehicle: 2018 Buick Enclave Premium

Hey everyone,

I've got a 2018 Buick Enclave Premium with about 70,000 miles on it. Lately, I've noticed a really annoying squealing sound coming from the brakes, especially when I'm coming to a stop at lower speeds. It's not constant, but it's happening more frequently now.

I had the pads and rotors replaced about 20,000 miles ago, so I'm a bit surprised to hear this again so soon. Could it be something simple, or am I looking at another big brake job? Any ideas on what might be causing this and what I should check first? Thanks for any help!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:49 AM

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ClearTheCode admin answer:

Squealing brakes are a common complaint and can stem from several issues, even after recent brake service. Here's a breakdown of potential causes and what to do:

  1. Brake Pad Wear Indicators: The most common cause of squealing is worn brake pads. Most pads have a small metal tab (wear indicator) that scrapes against the rotor when the pad material gets low, producing a high-pitched squeal. Even if replaced 20k miles ago, driving style can significantly impact pad life.
  2. Improper Installation or Cheap Pads: If the pads were installed without proper lubrication on the caliper pins or backing plates, or if lower-quality pads were used, they can squeal. Some aftermarket pads are simply noisier than OEM.
  3. Glazed Rotors or Pads: Overheating can cause the surface of the pads or rotors to become hardened and shiny (glazed), leading to noise and reduced braking performance.
  4. Rust or Debris: A small stone, rust buildup on the rotor edge, or other debris caught between the pad and rotor can cause squealing. This is often intermittent.
  5. Caliper Issues: A sticking caliper piston or slide pin can cause uneven pad wear and persistent squealing, as the pad remains in contact with the rotor.

When to See a Shop:

  • Immediate Inspection: If the squealing is accompanied by grinding, a soft brake pedal, or a noticeable decrease in braking effectiveness, you should have it inspected immediately. Grinding indicates metal-on-metal contact, which can quickly damage rotors.
  • Persistent Squeal: If the squealing continues after a few days of normal driving and isn't just due to morning dew or light surface rust, it's best to have a professional diagnose the issue. They can inspect pad thickness, rotor condition, and caliper function.
  • DIY Check (Caution): You can visually inspect your brake pads through the wheel spokes. If the pad material looks very thin (less than 3-4mm), it's time for replacement. However, a full inspection requires removing the wheels.
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