2020 Yukon - PowerStop Rotors Warped after 4 months - SOLVED

2Luckysat said:

Awesome thanks Doubeleive! The truck hasn't been driven hard or beat on it in anyway. I would love to keep the current setup as its been a nice upgrade to the truck which
stops much better with the PowerStop rotors & pads... Hopefully just a bad caliper. Someone else suggested possibly a problem with the rear end or axle bearings but this issue only occurs during braking and not on acceleration so I don't think its that... I'll followup once the issue is hopefully resolved

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one other thing you should consider if it has not been done is "parking brake" if the parking brake shoe is worn off and "touching" that can make noise, perhaps pull the rotors and inspect the parking brake while you are checking things out, just to rule in/out

I have the PowerStop Z23 setup (also drilled and slotted) on the front of my 2007 and they've been flawless. I tow with it occasionally and most recently did so over the spine of the Blue Ridge because it was snowing and I didn't want to use my newer 'garage-kept' Suburban for the trip. Like the others here, I suspect a sticking caliper on yours. I had a front one sticking on this same rig (which is what caused me to have to replace the rotors, pads and calipers in the first place) and it warps the rotors - any rotors - in short order.

2Luckysat said:

Thank you Marky, other people said something similar and to stick with OEM. Fronts are currently working well.

Would you recommend replacing the rears with OEM non drilled and slotted? Also could it be a be a problem with a bearing or fitting in the rear axle?

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Never said anything against 'slotted', I'm all for 'slotted', with only one condition:
at least one end of each slot should continue past an edge of the braking surface of the rotor.
A slot trapped at both ends is a long dimple, not a slot.
Slots allow brake dust to escape the rotor, not to hide in a dimple.
Tend to prefer slots that escape the rotor's outer edge when rolling forward.

I suppose it could be a bearing? Not sure how it would be a fitting?

The other possibility, believe it or not, is when you sit stopped at the stopsign or redlight,
are you pushing down on the brake pedal too hard?
I knew a cabbie that used the brake pedal as a sort of leg press machine at redlights.
Typically warped rotors til mechanic explained to lighten up unless ground was not level.

Follow Up: Just wanted to take a moment to thank everyone for sharing their knowledge and experience. As it turns out the problem was with the front drivers side rotor (not the rear that I initially thought the sound was coming from). The mechanic indexed it and found the front rotor was wobbling due to rust buildup on the hub assembly causing an uneven surface. He tried to clean and sand down everything but decided to change the hub out and reinstall the PowerStop rotor. I've put about 200 miles of local driving since and the issue appears to have been resolved. I deeply appreciate the help and wish you and your families a happy Easter Sunday.

2Luckysat said:

Follow Up: Just wanted to take a moment to thank everyone for sharing their knowledge and experience. As it turns out the problem was with the front drivers side rotor (not the rear that I initially thought the sound was coming from). The mechanic indexed it and found the front rotor was wobbling due to rust buildup on the hub assembly causing an uneven surface. He tried to clean and sand down everything but decided to change the hub out and reinstall the PowerStop rotor. I've put about 200 miles of local driving since and the issue appears to have been resolved. I deeply appreciate the help and wish you and your families a happy Easter Sunday.

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Good to hear...... and we learned a lot!! ( At least, I did ).....
I have PowerStops on my fronts...... and their pads on the rear, for a while.... so far... all's good !!

2Luckysat said:

Follow Up: Just wanted to take a moment to thank everyone for sharing their knowledge and experience. As it turns out the problem was with the front drivers side rotor (not the rear that I initially thought the sound was coming from). The mechanic indexed it and found the front rotor was wobbling due to rust buildup on the hub assembly causing an uneven surface. He tried to clean and sand down everything but decided to change the hub out and reinstall the PowerStop rotor. I've put about 200 miles of local driving since and the issue appears to have been resolved. I deeply appreciate the help and wish you and your families a happy Easter Sunday.

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Thanks for the follow up. It serves as a good reminder to watch for this when we are doing brakes.