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Discussion Starter #1
Hello...


I have a 2017 Impala; and ever since I bought it (new) when I reverse and apply the brakes, there is a squeal/grinding noise. Now this doesn't happen all the time, and usually only happens when the car is "cold", like in the morning backing out of my drive way, or at work when i'm leaving for the day.


I've taken it to the dealership a few times already for this, but they can't find anything and tell me everything is fine. Last time they cleaned them out with compressed air and then applied some type of lubricant, but the next day the squeal was there again.


Any ideas or suggestions?
 

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Hello...


I have a 2017 Impala; and ever since I bought it (new) when I reverse and apply the brakes, there is a squeal/grinding noise. Now this doesn't happen all the time, and usually only happens when the car is "cold", like in the morning backing out of my drive way, or at work when i'm leaving for the day.


I've taken it to the dealership a few times already for this, but they can't find anything and tell me everything is fine. Last time they cleaned them out with compressed air and then applied some type of lubricant, but the next day the squeal was there again.


Any ideas or suggestions?

I own a 2014 Impala 2LTZ - purchased new.

Do you have OEM brake pads and rotors?

If you live in an area of high humidity, it is common for light surface rust to form on the brake rotors overnight.

When you first drive the vehicle, the first few brake applications scrub off the rust, and can cause the noise. The disc brake rotors and brake system are considered self-cleaning (other than the lubrication of the caliper and pad slide points).

This may be the noise you are hearing.
 

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Yes, my car still has the oem rotors and pads... (currently my vehicle has 28k miles, though for this that doesn't matter I suppose). I do keep it in my garage though... I live in Tx so the humidty isn't that high...
 

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Yes, my car still has the oem rotors and pads... (currently my vehicle has 28k miles, though for this that doesn't matter I suppose). I do keep it in my garage though... I live in Tx so the humidty isn't that high...
I asked about the OEM pads & rotors, as some aftermarket pads & rotors can be noisy.

Do you periodically use the electric parking brake? Perhaps, the brake is dragging or sticking?
 

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I own a 2016 Impala lt and we have the same issue. Pretty sure our issue is the parking brake. We have sat in the car talking one evening and heard it set itself (I did not touch it) so after that I tried releasing the brake (even if I didn't set it) before I would back up and it seemed to help. The dealership has had my car for over a month (for this issue, transmission slips, ac issues, and service side detection light keeps coming on) and it's been a nightmare. Everything I have asked them to check they "can not duplicate" the issue because there are no codes. Then there is nothing wrong. So we have decided that they either do not know how to fix something if it does not have a code or they are waiting for my warranty to expire in 6000 miles ?
 
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