Exaust Rattle with 4.3 trucks - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Doug76 · 01-29-2008, 12:51 AM

Anyone else have the 4.3 exaust rattle?..mines an '06 with 16k on it and sounds like a '76 when I am taking off. anyone have the quick fix for it or do I have to spend a day at the dealer?

mothertrucker424 · 01-30-2008, 12:48 PM

what type of rattle

Bishops Trucks · 01-30-2008, 12:59 PM

Heatshield for the muffler rattle? My '90 did that to.

DavesRide · 02-08-2008, 10:39 AM

If my memory serves me correct there is either weights that can be added to the exhaust or a flex type pipe for whiner's like you that just had to have the 4.3. Just kidding, but there is a fix. I have been cut off from my online GM manuals or I would find the TSB for you. It has to do with the vibration the engine produces as the 6 is not as smooth as the V8. There is a cure.
Still under warranty in time and miles? I do know the GM techs personally and I can ask more questions if needed.

WELD4DAYS · 02-08-2008, 10:55 PM

I have a 2002 Silverado with a 4.3.I also had a rattle.I found mine.It was one of the O2 sensors rattling down on the exhaust.If I grabbed it while it was running I could get the noise to stop.It seems like the tip on the O2 sensor came loose or something.I replaced it and the noise stopped.Hope this helps.

PrerunnerRob · 02-25-2008, 08:33 PM

Quote:

Originally Posted by WELD4DAYS

I have a 2002 Silverado with a 4.3.I also had a rattle.I found mine.It was one of the O2 sensors rattling down on the exhaust.If I grabbed it while it was running I could get the noise to stop.It seems like the tip on the O2 sensor came loose or something.I replaced it and the noise stopped.Hope this helps.

I had a similar problem on my 5.3, I found that there is a collar that slips over the o2 senser, with a braided fabric to protect the wires. The collar was rattleing on the o2 sensor, creating a very low noise.

01-29-2008, 12:51 AM	#1
Doug76 This S&*! Is expensive! Join Date: Feb 2005 Location: Mechanicsville,Va Posts: 57	Exaust Rattle with 4.3 trucks Anyone else have the 4.3 exaust rattle?..mines an '06 with 16k on it and sounds like a '76 when I am taking off. anyone have the quick fix for it or do I have to spend a day at the dealer?

01-30-2008, 12:48 PM	#2
mothertrucker424 Registered User Join Date: Sep 2006 Location: st pete Posts: 404	Re: Exaust Rattle with 4.3 trucks what type of rattle __________________ _-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- 1972 K10 4"lift 33"tires (soon to be bigger and better) 2000 silverado 1500 2wd 2"coil spacers3" BL 285/75/16's

01-30-2008, 12:59 PM	#3
Bishops Trucks KEEP ON TRUCKIN' Join Date: Jun 2005 Location: Sterling, Va. Posts: 5,731	Re: Exaust Rattle with 4.3 trucks Heatshield for the muffler rattle? My '90 did that to. __________________ JIM '97 GMC Sierra K1500 '95 Chevy Silverado C1500 '71 Cheyenne Z71 / LT1 & 4-Speed SWB K/10 Father/Son Project http://www.youtube.com/watch?v=4l689JKXPnA http://67-72chevytrucks.com/vboard/payments.php "LIVIN' FREE FOREVER"

02-08-2008, 10:39 AM	#4
DavesRide Registered User Join Date: Oct 2007 Location: Garageless, Missouri Posts: 408	Re: Exaust Rattle with 4.3 trucks If my memory serves me correct there is either weights that can be added to the exhaust or a flex type pipe for whiner's like you that just had to have the 4.3. Just kidding, but there is a fix. I have been cut off from my online GM manuals or I would find the TSB for you. It has to do with the vibration the engine produces as the 6 is not as smooth as the V8. There is a cure. Still under warranty in time and miles? I do know the GM techs personally and I can ask more questions if needed. __________________ R.I.P ESLL Even as the body dies the spirit lives on in the people you touched

02-08-2008, 10:55 PM	#5
WELD4DAYS Registered User Join Date: Nov 2007 Location: Phoenix,AZ Posts: 107	Re: Exaust Rattle with 4.3 trucks I have a 2002 Silverado with a 4.3.I also had a rattle.I found mine.It was one of the O2 sensors rattling down on the exhaust.If I grabbed it while it was running I could get the noise to stop.It seems like the tip on the O2 sensor came loose or something.I replaced it and the noise stopped.Hope this helps.



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