Help With Noise From 08 Sierra

[jbannick18]

I have this noise coming from my 08 Sierra that has been going on for a couple months. I've tooken it to the dealer but they said they didn't hear anything so I went ahead and took audio and I am giong to bring it in next week sometime. I just want to go in there knowing what is wrong or atleast an idea so they can't tell me they didn't hear it. Thanks for the help

 

 

On the video you can really hear it around 22-25 seconds

 

Noise at 10, 17, 23, 49,

 

 

 

 

Thanks again

[VMax2007]

Sounds like a submarine.

 

And did you really say: "I've tooken it..."

[jbannick18]

Lol, didn't even notice that. So, anyone know why it sounds like a submarine?

[jbannick18]

Lol, didn't even notice that. So, anyone know why it sounds like a submarine?

 

 

Bump

[z7107sierra]

Lol, didn't even notice that. So, anyone know why it sounds like a submarine?

 

 

Bump

 

 

It almost sounds like a peice of tin rattling..Maybe something in your exhaust? could be a loose bolt holding the tin manifold gaurd on?

 

I know the perfect solution if you cannot find anything loose..turn the radio up =)

[jbannick18]

Lol, didn't even notice that. So, anyone know why it sounds like a submarine?

 

 

Bump

 

 

It almost sounds like a peice of tin rattling..Maybe something in your exhaust? could be a loose bolt holding the tin manifold gaurd on?

 

I know the perfect solution if you cannot find anything loose..turn the radio up =)

 

 

Thats what I've been doing but its just annoying me cause I haven't figured it out. If it was something loose wouldn't it do it all the time though around the higher rpms? I've only heard it around 1,500 when its about to shift out of 1st and very rarely at 1,000 when accelerating. I appreciate the advice i am going to look at it tomorrow and see if anything is loose, if anyone else has anything let me know. Thanks

[Sir Dan]

Sounds to me like a loose exhaust component vibrating at that certain RPM... like either a heat shield or loose flange. I know there is a TSB on some of these trucks for exhaust system noises.

[texx]

Muffler bearing. Might be the kanewter valve.

[jbannick18]

Muffler bearing. Might be the kanewter valve.

 

 

Is the muffler bearing easily accessible or should I just have a professional look at it?

[Sir Dan]

You should have a professional look at it. Also have him check your blinker fluid...it may be low.

[jbannick18]

You should have a professional look at it. Also have him check your blinker fluid...it may be low.

 

 

Now im not that gullible, i fell for the muffler bearing but not the kanewter or blinker fluid. I have a little sense of car knowledge lol

[texx]

You should have a professional look at it. Also have him check your blinker fluid...it may be low.

 

 

Now im not that gullible, i fell for the muffler bearing but not the kanewter or blinker fluid. I have a little sense of car knowledge lol

 

 

We're just having fun with you... I usually ask the new parts guy for a radiator hose for my 1967 VW beetle.

 

As for your noise, I have never heard anything like that.