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Buzzing sound on start up - '04 2500HD

Bob Q

By Bob Q
in 2000-2014 Silverado HD & Sierra HD

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Bob Q Enthusiast

Bob Q

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Posted

My '04 2500HD 4x4 CC makes a buzzing sound after it starts up. It sounds like it's coming from around the transmission area, but it's hard to tell. The sound usually lasts about 3-4 seconds and can get fairly loud at times; it's audible while in the cab and outside. It happens during cold starts and warm starts and sometimes it does it immediately after the the truck fires up or sometimes takes a minute or two until it does it. I've taken it to the dealer and had the service manager listen to it, but when I left it with them, they said they couldn't get it to do it again. :D Any ideas what it could be? The truck has about 12,000 miles on it and has a 6.0L and 4L80E. Thanks.

redbugdave Enthusiast

redbugdave

Posted
Posted

Hello Bob,

 

That sounds like my truck...I have an 06...6.0 liter. Please see the post below titled "6.0 rattle when cold". You may be describing what we have been trying to figure out.

 

Dave

Bob Q Enthusiast

Bob Q

Posted
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Posted
Hello Bob,

 

That sounds like my truck...I have an 06...6.0 liter. Please see the post below titled "6.0 rattle when cold".  You may be describing what we have been trying to figure out.

 

Dave

 

 

 

 

Thanks Dave. I'll check it out.

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