Interesting noise coming from under truck....

[Griffwing]

So I've had this noise since shortly getting my truck. It's been to the dealer and of course they can't "Recreate customer complaint". So hopefully someone here can point me in the right direction to resolving it. After the first visit to the dealer the noise seemed to be less frequent and a lot quieter. After some off-roading though the noise is getting worse again

 

[ZR2NYC]

So I've had this noise since shortly getting my truck. It's been to the dealer and of course they can't "Recreate customer complaint". So hopefully someone here can point me in the right direction to resolving it. After the first visit to the dealer the noise seemed to be less frequent and a lot quieter. After some off-roading though the noise is getting worse again
View attachment 12250

guessing you have diesel? sounds like a sheild or skid plate. start front
to rear inspection. good luck.

 

[HighTechPauper]

Check this post, it has a video, I knew I’d heard that sound before.

2024 3.0 duramax grinding noise UPDATE

Hey guys, so idk if anyone has the weird metal grinding noise coming from the exhaust. Brought to dealer. They said the noise was normal, it’s the exhaust flapper. APPARENTLY for some reason GM put them on the exhaust and it’s on a sensor now. Check out the photo, it almost looks like an...

www.duramaxforum.com

 

[ZR2NYC]

Check this post, it has a video, I knew I’d heard that sound before.

2024 3.0 duramax grinding noise UPDATE

Hey guys, so idk if anyone has the weird metal grinding noise coming from the exhaust. Brought to dealer. They said the noise was normal, it’s the exhaust flapper. APPARENTLY for some reason GM put them on the exhaust and it’s on a sensor now. Check out the photo, it almost looks like an...

www.duramaxforum.com

def sounds like rattle..i didnt get grinding.

 

[Griffwing]

def sounds like rattle..i didnt get grinding.

Thanks! I’ll def look into it and see if that’s the issue!

 

[Griffwing]

def sounds like rattle..i didnt get grinding.

Thank you!

 

[HighTechPauper]

def sounds like rattle..i didnt get grinding.

OP’s description in the DF post set aside, that’s the noise.

 

[ZR2xBIZON]

I had a similar noise but more like gurgling after we stopped for lunch on the trails. Never heard it before and I've been offroading since I got the truck.
Noise went away by the time we were done.

The area it was coming from was by the tank area. Touched numerous surfaces but couldn't find a vibration.

I have the 6.2

 

[HighTechPauper]

I wonder if that was just the gas tank venting through the evap canister?

 

[AXE]

There's alot of play in the exhaust hangers, it could easily be a heat shield up against the exhaust. It's easy to get under the truck and look as it sits off the ground.