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Buzzing Sound


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#1 Nlindste

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Posted 29 June 2011 - 08:59 PM

I have a 2009 Sierra that has recently developed a buzzing noise coming from the passenger side of the truck. The noise happens at 40 mph when I let my foot off the accelerator. The same noise happens between 70-75mph. The noise sounds like plastic buzzing or vibrating against plastic. I had removed my bug shield with no relief from the sound. My truck unfortunately is out of warranty.


Thanks
Nick

#2 JdubUB

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Posted 29 June 2011 - 09:38 PM

it could possibly be your windshield trim piece :thumbs: . its been known to affect a number of us on here. Mine slapped on the passenger side up high, I took it to the dealer, they pulled it off, re-sealed everything and sent me on my way. its been fixed ever since. mine sounded more like plastic SLAMMING more plastic, annoying as hell......

Edited by JdubUB, 29 June 2011 - 09:39 PM.

-You can set my truck on fire, and role it down a hill, but I still wouldn't trade it for a Coupe De'ville-
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--Blackbear Performance Tune (AutoCal 89oct.), ADVENT OGM-1, GMPP/Borla Exhaust, Spray in Liner, AMP Power Steps,
Wheel Well Liner, Tint, Billet Bowtie, 285/65/18 Terra Graps, RC Leveling Kit, 2.25" Rear Blocks, De-badged, Weathertech Liners, Fog Light Diode Mod, Escort 9500ix, Viper 5701, "Pocket Rocket" Glock .357, Nothing But AMSOIL--

2008 GMC Sierra- SOLD

#3 Nlindste

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Posted 29 June 2011 - 09:48 PM

it could possibly be your windshield trim piece :thumbs: . its been known to affect a number of us on here. Mine slapped on the passenger side up high, I took it to the dealer, they pulled it off, re-sealed everything and sent me on my way. its been fixed ever since. mine sounded more like plastic SLAMMING more plastic, annoying as hell......



I will have to take a look. I had the trim piece making the noise like someone was throwing sand at the window. This noise is getting to be really annoying because it only happens in the speeds I am mostly in. It is weird that as soon as I get up to 45 it goes away and doesn't come back until 70 and then goes away at 75.

#4 JdubUB

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Posted 29 June 2011 - 10:38 PM

I bet that is it :thumbs:
-You can set my truck on fire, and role it down a hill, but I still wouldn't trade it for a Coupe De'ville-
Posted Image
--Blackbear Performance Tune (AutoCal 89oct.), ADVENT OGM-1, GMPP/Borla Exhaust, Spray in Liner, AMP Power Steps,
Wheel Well Liner, Tint, Billet Bowtie, 285/65/18 Terra Graps, RC Leveling Kit, 2.25" Rear Blocks, De-badged, Weathertech Liners, Fog Light Diode Mod, Escort 9500ix, Viper 5701, "Pocket Rocket" Glock .357, Nothing But AMSOIL--

2008 GMC Sierra- SOLD

#5 matt3

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Posted 30 June 2011 - 06:56 AM

My 08 Sierra had AC lines that were vibrating in that area.
08 Sierra ext. cab short bed WT 2wd, tow package, 5.3, 3.73, DIC upgrade, OEM molded splash guards, OEM bed rail caps, Rino liner, added chrome surround grill, added 17 inch OEM alloy wheels, Stainless capped Denali lug nuts, Magnaflow muffler dual exit, Black Bear 93 octane tune, Airaid MIT, AEM dryflow filter, 15% tint on back 3, 285/70/17 BFG AT, 2" RC leveling kit

Mods to come: OEM fog lights, get the effing dent out of my front bumper! SOLD!

09 Dodge Ram SLT Big Horn with Hemi 4x4

#6 Nlindste

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Posted 30 June 2011 - 07:32 AM

My 08 Sierra had AC lines that were vibrating in that area.


Matt

What did you do to solve the AC lines vibrating?

Nick

#7 kdixer

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Posted 30 June 2011 - 11:26 AM

I had an 02 Avalanche that did something very similar. There was a definite "buzzing" sound under very specific conditions. The throttle position, engine load and rpm had to be just right for it to make the noise. But as you problem, it mostly occured around the speeds I mostly traveled with the engine lugging slightly. The sound was not a rattle. It was a definite buzzing sound. It turned out to be the heat exchanger in the AC unit making contact with the plastic housing. My solution was to put a wedge between the metal cross member in the dash and the plastic housing that held the heater coil and heat exchanger. The way I found the source of the noise was to let a friend drive the truck and listen for the noise and push on certain items until the noise would stop.
The intention of my posts are simply an expression of my personal opinion. If they offend you, let me go ahead and appologize now. If that is not good enough, why do you care what i think? You probably don't even know me anyway.

#8 matt3

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Posted 01 July 2011 - 11:02 AM

My 08 Sierra had AC lines that were vibrating in that area.


Matt

What did you do to solve the AC lines vibrating?

Nick


Dealer fixed it. Idk.
08 Sierra ext. cab short bed WT 2wd, tow package, 5.3, 3.73, DIC upgrade, OEM molded splash guards, OEM bed rail caps, Rino liner, added chrome surround grill, added 17 inch OEM alloy wheels, Stainless capped Denali lug nuts, Magnaflow muffler dual exit, Black Bear 93 octane tune, Airaid MIT, AEM dryflow filter, 15% tint on back 3, 285/70/17 BFG AT, 2" RC leveling kit

Mods to come: OEM fog lights, get the effing dent out of my front bumper! SOLD!

09 Dodge Ram SLT Big Horn with Hemi 4x4




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