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2018 XT5 Brakes Squealing and Pulsating - What gives?

0

Mike T. · rep 0 · May 25, 2:52 AM · 1 replies · solved · Question

Vehicle: 2018 Cadillac XT5 Premium Luxury

Hi all,

I own a 2018 Cadillac XT5 Premium Luxury, and lately, my brakes have been acting up. I'm experiencing a really annoying squealing sound, especially when I'm braking at lower speeds or coming to a stop. It's not constant, but it's definitely noticeable and quite loud.

On top of the squealing, I've also started to feel a pulsation through the brake pedal. It's like the pedal is vibrating slightly when I apply the brakes, which makes me think something might be warped. This usually happens when I'm braking from higher speeds.

I haven't had the brakes serviced in a while, but I didn't think they were due yet. Could this be more than just worn pads? Any advice on what to look for or what might be going on?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 2:52 AM

0

ClearTheCode admin answer:

The squealing and pulsation you're experiencing with your 2018 Cadillac XT5 are classic symptoms of brake system wear or issues. It's important to address these promptly for safety and to prevent more costly repairs.

Common Causes:

  1. Squealing Brakes:
    • Worn Brake Pads: Most pads have wear indicators that cause a high-pitched squeal when they are low.
    • Glazed Rotors/Pads: Overheating can cause a hardened, smooth surface on the pads or rotors, leading to noise.
    • Contamination: Dirt, debris, or moisture can get trapped between the pad and rotor.
    • Improper Installation: If pads or shims weren't installed correctly, they can vibrate and squeal.
  2. Brake Pulsation (Vibration):
    • Warped Rotors: This is the most common cause. Uneven wear or overheating can cause the rotor surface to become non-uniform, leading to a vibrating pedal as the pads contact the high and low spots.
    • Caliper Issues: A sticking caliper piston or slide pins can cause uneven pad wear and lead to pulsation.
    • Wheel Bearing Issues: Less common, but a worn wheel bearing can sometimes mimic brake pulsation.

Diagnostic Steps & When to See a Shop:

  1. Visual Inspection: Carefully inspect your brake pads and rotors. Look for:
    • Pad thickness (should be at least 3-4mm).
    • Scoring or grooves on the rotor surface.
    • Any discoloration (blue spots indicate overheating).
  2. Listen and Feel: Try to determine if the noise is coming from a specific wheel. Note if the pulsation changes with braking force or speed.
  3. Professional Brake Inspection: While mechanical brake issues don't typically trigger OBD codes (unless related to ABS or traction control sensors, e.g., C0035-C0050 for wheel speed sensors), a professional technician can accurately measure rotor runout (to check for warping), inspect caliper function, and assess pad wear. They can also check for any underlying issues like a faulty wheel bearing.
  4. Timely Repair: Do not ignore these symptoms. Worn or warped brakes compromise your vehicle's stopping power and safety. Addressing them quickly can often be resolved with new pads and rotors, preventing damage to other components like calipers.
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