2012 LTZ, brake problems, again - Chevy Impala Forums
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post #1 of (permalink) Old 2 Weeks Ago Thread Starter
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Unhappy 2012 LTZ, brake problems, again

So I've actually posted about this problem a year ago here:
https://www.impalaforums.com/chevy-i...e-defects.html

Long story short, a year ago my dashboard says "service brake system", "service traction control", "service brake assist", and the car actually shakes slightly when I brake. I took it to a local mechanic; they say the brake fluid is running out, and they replaced the right rear caliper.

However, it seems the problem is only partially solved - I still sometimes feel the car shakes when it brakes, although much smoother than before. And now one year after the same problem comes again, dashboard says "service brake system", "service traction control", "service brake assist".

What is your advice in this situation? Should I take it to a dealer instead? The local mechanic here (Walter's automotive in Pittsburgh) is known for good price but also for being "not very clever" on repairs. I only know very little about DIY - have only done things like changing light bulbs and battery.

Thank you so much!
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post #2 of (permalink) Old 2 Weeks Ago
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From what I've read up online and from people who own them is that it's an issue with the wheel bearing wire connector (never tried yet on mine) I have all them lights on. And they'd go on and off when turning etc . But now it's always on, brake assist, traction light , it's annoying but I dont feel a difference in braking or anything .

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Originally Posted by xuycimpala View Post
So I've actually posted about this problem a year ago here:
https://www.impalaforums.com/chevy-i...e-defects.html

Long story short, a year ago my dashboard says "service brake system", "service traction control", "service brake assist", and the car actually shakes slightly when I brake. I took it to a local mechanic; they say the brake fluid is running out, and they replaced the right rear caliper.

However, it seems the problem is only partially solved - I still sometimes feel the car shakes when it brakes, although much smoother than before. And now one year after the same problem comes again, dashboard says "service brake system", "service traction control", "service brake assist".

What is your advice in this situation? Should I take it to a dealer instead? The local mechanic here (Walter's automotive in Pittsburgh) is known for good price but also for being "not very clever" on repairs. I only know very little about DIY - have only done things like changing light bulbs and battery.

Thank you so much!
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Quote:
Originally Posted by jonolach View Post
From what I've read up online and from people who own them is that it's an issue with the wheel bearing wire connector (never tried yet on mine) I have all them lights on. And they'd go on and off when turning etc . But now it's always on, brake assist, traction light , it's annoying but I dont feel a difference in braking or anything .
Yeah I think there are some differences because mine is always on, once I start the engine (maybe a bit later than that). Not sure about the difference in braking though, actually it feels kinda better than before...
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Err... Any thoughts? Looking for some help...
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I do not see how low brake fluid would cause pulsing or chatter while braking. These cars have undersized front rotors and they warp periodically. I have a 2009 LTZ with almost 180k miles on it and the front brake rotors (even the OEM ones) will not last 30k miles before they warp. As for service the brake or traction control message, I have gotten these messages several times when I apparently drove though some puddles in heavy rain and water most likely seeped into the ABS sensor connector on one of the front wheels. After the water dried out, the messages did not appear again. Also, I had similar messages appear when the battery was very weak and died in a few days. Replacing the battery always fixed the problem and I never got these messages again.

Lately I have been getting front brake rotors at the local LKQ do it yourself junkyard. I have been able to find Impala cars with almost new OEM front rotors which I can buy for $ 6 a piece.
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Took it to the dealer so it was the driver's side caliper again (last time it was passenger's side). Got it repaired. Painful...
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Taking it to the dealer is the best idea.
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