Alright Newby here... Exhaust rattle 2012 impala LTZ - Page 3 - Chevy Impala Forums
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post #31 of (permalink) Old 02-22-2015
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My 2012 LTZ does not appear to make the noise or maybe I just do not hear it. It has a little over 63k miles on it so far, drives well. I personally like the stiffer suspension and the seats are not bad, but then my dd is a 2012 Sonic LT.
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post #32 of (permalink) Old 11-25-2015
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Found the offending noise maker on my 2012 Impala. Short flex section just behind the bend over the cross member.
See attached images.
Replace with new flex by my local exhaust shop, ~$150.
No more noise...
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post #33 of (permalink) Old 04-08-2019
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5 Year Update

Since we were all told by GM this is normal and no fix was required, is there anyone here that still has this annoying noise on startup?

Has it gotten worse over the years or still the same?

Do you experience the slight rattle during regular driving?

Has anyone replaced the exhaust and if so, did the problem return with the new exhaust?
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post #34 of (permalink) Old 04-08-2019
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Quote:
Originally Posted by SAAN View Post
Since we were all told by GM this is normal and no fix was required, is there anyone here that still has this annoying noise on startup?

Has it gotten worse over the years or still the same?

Do you experience the slight rattle during regular driving?

Has anyone replaced the exhaust and if so, did the problem return with the new exhaust?
I've had the noise since I bought the car two years ago. It still hasn't changed at all or gotten worse. Only lasts for a few seconds on start up, when the engine is cold. Never heard it while driving. While mildly annoying, I never looked into getting it fixed.
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post #35 of (permalink) Old 04-10-2019
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Quote:
Originally Posted by SAAN View Post
Since we were all told by GM this is normal and no fix was required, is there anyone here that still has this annoying noise on startup?

Has it gotten worse over the years or still the same?

Do you experience the slight rattle during regular driving?

Has anyone replaced the exhaust and if so, did the problem return with the new exhaust?
Yes, mine does this also... cold start up for about 5 seconds. Doesn't happen again after this. Haven't bothered with fixing it but I may do it down the road. Not really annoying enough yet. Still running full stock exhaust system.

2014 Chevy Impala LTZ Limited
- My daily driver... 5% Window Tint, Rosen GM1210 Stereo, Polk Audio Components and 6x9s, Pioneer, Kenwood amps and sub, Addco Rear Sway Bar, ZZP Strut Tower Braces, LED fogs and low beams, back up and interior lighting, SS dash, stereo and shifter trim.
2004 Pontiac GTO
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2004 GMC Yukon SLT
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post #36 of (permalink) Old 04-11-2019
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Quote:
Originally Posted by outlawarrior View Post
Found the offending noise maker on my 2012 Impala. Short flex section just behind the bend over the cross member.
See attached images.
Replace with new flex by my local exhaust shop, ~$150.
No more noise...
In the crossover pipe between the exhaust manifold flanges??? That's a strange place to put a flex section...

Why not after the wye?

2009 Impala SS
"Speed never killed anyone. Suddenly becoming stationary... that's what gets you." Jeremy Clarkson
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