Subject:Rattle Noise Under Vehicle - May Be Engine RPM Related - Page 3 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

partymn · 10-13-2011, 12:41 AM

I have the same issue with my exhaust, I tested for this condition and it does exist in my 2011. I also looked around for other things that may be wrong and found a plastic shield that covers the fuel lines on the right side of the car that is loose. If you look at the back of the shield there appears to be mount bolt holes on each side and neither one has a bolt in it. If you flip it, it vibrates against the body of the car and makes a buzzing sound. I assume that this is one of my noises. I am going to take it in after the GM rep gets back to me.

Good luck with your rattle.

maldon · 10-13-2011, 05:13 PM

Just got an update, 4th day at the shop. None of the technicians can hear the rattle.

I'm going to try to record it with my cellphone or a laptop I guess, and then take it back in and play the recording.

The dealership doesn't have access to a dyno, or they could probably reproduce it immediately.

Jeff M, this buzzing rattle sounds almost like the top of a tin can being spun on a dremel against rough concrete, and it's coming from the passenger side rear end under the vehicle. bzzZZZZEEEE bbzzzzzEEEE.
It *only* happens at 1400 RPMs under heavy throttle. Higher gears stay in this range longer because there isn't enough horsepower to get out of the RPM range very quickly. Even so, the longest it lasts is about 3 seconds.
But that means in 6th gear ever time I accelerate it happens for three seconds, which is long and often in slow moving heavy traffic.

Any thoughts/suggestions?

Chevrolet Customer Svc · 10-14-2011, 03:36 PM

Unfortunately there isn't any documentation that I can see that would provide a fix for these issues at this time. I've been looking to make sure I am as up to date on this as possible and I haven't found anything that would resolve this. Sorry I can't be of more help in this situation.

Jeff Morris, Chevrolet Customer Service

maldon · 10-17-2011, 10:11 AM

Jeff M, if I have a notary public ride with me and verify the noise, and then deliver notarized documentation to Chevrolet or a dealership, will that be enough proof to get warranty part replacements done when the grinding part finally fails, regardless of warranty period?

That's my main worry. That the buzzing continues the life of the vehicle until, say, the differential or something finally destroys itself outside of the warranty.

Chevrolet Customer Svc · 10-17-2011, 02:12 PM

I'm sorry maldon but I am unsure as to whether notorized documents would be accepted as proof for warranty repairs. I would think it would be up to the dealer to accept that type of evidence but again I am not sure.

Jeff Morris, Chevrolet Customer Service

f5journal · 10-17-2011, 02:24 PM

Maldon and Partyman....GFX bezels

maldon · 10-17-2011, 04:17 PM

I don't have ground effects. Maybe the ones on the tail lights?

maldon · 10-17-2011, 04:25 PM

Also, my buzzing only happens when the clutch is engaged, but I guess anything in the rear end would buzz more loudly if the drivetrain was fully engaged due since the engine would now be fully connected to it.

f5journal · 10-18-2011, 08:10 AM

Well...I noticed that one of you guys have GFX. Mine will metallic buzz now and then under the conditions you describe

maldon · 10-18-2011, 11:29 AM

This morning it was colder than usual out, and I had the same pitched buzz when the engine was turning over right as the car started up.
This was in neutral, though, and all other times I get the buzz while driving, it's in gear.

Hrm.

Anyone know if this could be the same sound, or know anything about a buzz at startup when the engine is cold?

partymn · 10-21-2011, 02:45 AM

The technical service bulletin on the first page tells what the problem is and when I tested for this condition I found the rattle. The exhaust didn't change from 2010 to 2011 so this bulletin still applies.

I had the GFX rattle as well, the dealership fixed that by adjusting the bezels so that they didn't rub on the exhaust. I have been chatting with a GM rep and hopefully they will give me a solution prior to me going back to the dealership. We shall see. How ever it gets fixed, I will not be living with it too much longer.

russofnj · 01-01-2012, 08:03 PM

Quote:

Originally Posted by Chevrolet Customer Svc

Hollywood74, have you tried speaking with another dealership in regards to this issue? I'm sorry to hear you're having problems this early in the ownership of your vehicle. If you're unable to get this addressed by your dealer let me know and I'll do what I can to assist you.

Jeff Morris, Chevrolet Customer Service

Hi Jeff, As you can see, I am still unable to get this resolved. The problem that I am still having is a strong vibration when rpm's are between 1200 7 1800. Dealerships don't seem willing to fix the issue, and GM customer service will not help unless the dealership says that there is a problem. Both visits to the dealer got me no where. I was told that the vibration is normal. What do i need to do to get this resolved?
Thanks
Russ

Chevrolet Customer Svc · 01-02-2012, 01:12 PM

Currently at this time there isn't a fix but we are working to resolve these issues. When I get better information I will let you all know. I'm sorry for the confusion.

Jeff Morris, Chevrolet Customer Service

maldon · 07-07-2012, 10:35 PM

I forgot to post an update for this. I finally took it to a different Chevrolet dealership, and after a few tries my service rep was able to reproduce the buzzing with the service manager, who *had* to witness it in order to authorize any warranty replacements. Understandable, but still annoying. It seemed like it was only reproducible after the car was warm and driven 5+ miles.

Anyhow, after that, they replaced both mufflers, and the buzzing was gone. Sweet blissful rumble is all that's left.

I really appreciate the work Reliable Chevrolet did to track this down. So many thanks to them for saving my sanity.

10-13-2011, 12:41 AM	#29
partymn Drives: 2014 1ss 1LE Join Date: Sep 2011 Location: Goose Creek, SC Posts: 877 View My Garage	I have the same issue with my exhaust, I tested for this condition and it does exist in my 2011. I also looked around for other things that may be wrong and found a plastic shield that covers the fuel lines on the right side of the car that is loose. If you look at the back of the shield there appears to be mount bolt holes on each side and neither one has a bolt in it. If you flip it, it vibrates against the body of the car and makes a buzzing sound. I assume that this is one of my noises. I am going to take it in after the GM rep gets back to me. Good luck with your rattle. __________________ 2014 1SS 1LE, bone stock for now.

10-21-2011, 02:45 AM	#39
partymn Drives: 2014 1ss 1LE Join Date: Sep 2011 Location: Goose Creek, SC Posts: 877 View My Garage	The technical service bulletin on the first page tells what the problem is and when I tested for this condition I found the rattle. The exhaust didn't change from 2010 to 2011 so this bulletin still applies. I had the GFX rattle as well, the dealership fixed that by adjusting the bezels so that they didn't rub on the exhaust. I have been chatting with a GM rep and hopefully they will give me a solution prior to me going back to the dealership. We shall see. How ever it gets fixed, I will not be living with it too much longer. __________________ 2014 1SS 1LE, bone stock for now.

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10-13-2011, 05:13 PM	#30
maldon Drives: 2010 Camaro 2SS/RS/Sunroof Join Date: May 2010 Location: Dallas, TX Posts: 18	Just got an update, 4th day at the shop. None of the technicians can hear the rattle. I'm going to try to record it with my cellphone or a laptop I guess, and then take it back in and play the recording. The dealership doesn't have access to a dyno, or they could probably reproduce it immediately. Jeff M, this buzzing rattle sounds almost like the top of a tin can being spun on a dremel against rough concrete, and it's coming from the passenger side rear end under the vehicle. bzzZZZZEEEE bbzzzzzEEEE. It only happens at 1400 RPMs under heavy throttle. Higher gears stay in this range longer because there isn't enough horsepower to get out of the RPM range very quickly. Even so, the longest it lasts is about 3 seconds. But that means in 6th gear ever time I accelerate it happens for three seconds, which is long and often in slow moving heavy traffic. Any thoughts/suggestions?

10-14-2011, 03:36 PM	#31
Chevrolet Customer Svc Drives: GM Vehicles Join Date: Jun 2010 Location: Michigan Posts: 9,327	Unfortunately there isn't any documentation that I can see that would provide a fix for these issues at this time. I've been looking to make sure I am as up to date on this as possible and I haven't found anything that would resolve this. Sorry I can't be of more help in this situation. Jeff Morris, Chevrolet Customer Service

10-17-2011, 10:11 AM	#32
maldon Drives: 2010 Camaro 2SS/RS/Sunroof Join Date: May 2010 Location: Dallas, TX Posts: 18	Jeff M, if I have a notary public ride with me and verify the noise, and then deliver notarized documentation to Chevrolet or a dealership, will that be enough proof to get warranty part replacements done when the grinding part finally fails, regardless of warranty period? That's my main worry. That the buzzing continues the life of the vehicle until, say, the differential or something finally destroys itself outside of the warranty.

10-17-2011, 02:12 PM	#33
Chevrolet Customer Svc Drives: GM Vehicles Join Date: Jun 2010 Location: Michigan Posts: 9,327	I'm sorry maldon but I am unsure as to whether notorized documents would be accepted as proof for warranty repairs. I would think it would be up to the dealer to accept that type of evidence but again I am not sure. Jeff Morris, Chevrolet Customer Service

10-17-2011, 02:24 PM	#34
f5journal Senior Camaro Fanatic Drives: 2011 SS/RS manual - White Join Date: Aug 2010 Location: aiken, sc Posts: 1,980	Maldon and Partyman....GFX bezels

10-17-2011, 04:17 PM	#35
maldon Drives: 2010 Camaro 2SS/RS/Sunroof Join Date: May 2010 Location: Dallas, TX Posts: 18	I don't have ground effects. Maybe the ones on the tail lights?

10-17-2011, 04:25 PM	#36
maldon Drives: 2010 Camaro 2SS/RS/Sunroof Join Date: May 2010 Location: Dallas, TX Posts: 18	Also, my buzzing only happens when the clutch is engaged, but I guess anything in the rear end would buzz more loudly if the drivetrain was fully engaged due since the engine would now be fully connected to it.

10-18-2011, 08:10 AM	#37
f5journal Senior Camaro Fanatic Drives: 2011 SS/RS manual - White Join Date: Aug 2010 Location: aiken, sc Posts: 1,980	Well...I noticed that one of you guys have GFX. Mine will metallic buzz now and then under the conditions you describe

10-18-2011, 11:29 AM	#38
maldon Drives: 2010 Camaro 2SS/RS/Sunroof Join Date: May 2010 Location: Dallas, TX Posts: 18	This morning it was colder than usual out, and I had the same pitched buzz when the engine was turning over right as the car started up. This was in neutral, though, and all other times I get the buzz while driving, it's in gear. Hrm. Anyone know if this could be the same sound, or know anything about a buzz at startup when the engine is cold?

01-02-2012, 01:12 PM	#41
Chevrolet Customer Svc Drives: GM Vehicles Join Date: Jun 2010 Location: Michigan Posts: 9,327	Currently at this time there isn't a fix but we are working to resolve these issues. When I get better information I will let you all know. I'm sorry for the confusion. Jeff Morris, Chevrolet Customer Service

07-07-2012, 10:35 PM	#42
maldon Drives: 2010 Camaro 2SS/RS/Sunroof Join Date: May 2010 Location: Dallas, TX Posts: 18	I forgot to post an update for this. I finally took it to a different Chevrolet dealership, and after a few tries my service rep was able to reproduce the buzzing with the service manager, who had to witness it in order to authorize any warranty replacements. Understandable, but still annoying. It seemed like it was only reproducible after the car was warm and driven 5+ miles. Anyhow, after that, they replaced both mufflers, and the buzzing was gone. Sweet blissful rumble is all that's left. I really appreciate the work Reliable Chevrolet did to track this down. So many thanks to them for saving my sanity.