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Hey,
Yesterday our 2017 Bolt started making intermittent grinding noises while travelling on the highway at 90+ kms per hour. First like a stuttering sound, then a few really big grinds.
Stopped and had it towed. It made the noise going forward up on the flatbed, but once backed off, no noise since.
Taking it to the dealer tomorrow.
Any ideas on what caused this?
Pat
 

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XJ12 is probably right - the first thing to check is to make sure you don't have a stone that bounced into the front brakes and got wedged in between the rotor and something else. Sounds awful, but luckily a trivial problem that can often be solved just by backing up a ways.
 

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Hey,
Yesterday our 2017 Bolt started making intermittent grinding noises while travelling on the highway at 90+ kms per hour. First like a stuttering sound, then a few really big grinds.
Stopped and had it towed. It made the noise going forward up on the flatbed, but once backed off, no noise since.
Taking it to the dealer tomorrow.
Any ideas on what caused this?
Pat
It could be the wheel bearig. I have the grinding noise on mine and after getting it in, they discovered it was the bearing on my front left wheel.
 
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