Random Clunking Noise

[Ungawa]

We have experienced a random clunking noise under floor of the 2nd row passenger seat. We have a 2022 Yukon 4 wheel drive. It seems to only occur below 30mph. It only happens a few times a month. Anyone have experience with this issues. Thanks.

 

[Chevymec]

Have you inspected anything underneath?

 

[JayceeP]

We have experienced a random clunking noise under floor of the 2nd row passenger seat. We have a 2022 Yukon 4 wheel drive. It seems to only occur below 30mph. It only happens a few times a month. Anyone have experience with this issues. Thanks.

Obvious thing, but the 2nd row, or 3rd row seats aren’t unlatched are they?

 

[KMeloney]

...at 30 MPH while just cruising along? Or is it when you go over a bump or something? (Need some more info here.)

 

[tahoe81]

There's some sort of clip under the vehicle. I don't know what it does, but the dealer fixed mine. They acted like this clip comes loose and blows and hits the undercarriage when you're driving

 

[KMeloney]

There's some sort of clip under the vehicle. I don't know what it does, but the dealer fixed mine. They acted like this clip comes loose and blows and hits the undercarriage when you're driving

Is that a "clunk," or more of a jingling sound? Because I feel like I have a jingling sound on deceleration -- like an exhaust "valve" jingles. Sounds like a light metal piece barely jingling against something (but this '23 6.2 makes a lot of different noises that my '09 5.3 didn't make).

If we're talking about an actual "clunk" that you can hear and feel, and you get it when going over some uneven surfaces, then I'm wondering if it's a loose spare tire.

 

[tahoe81]

Is that a "clunk," or more of a jingling sound? Because I feel like I have a jingling sound on deceleration -- like an exhaust "valve" jingles. Sounds like a light metal piece barely jingling against something (but this '23 6.2 makes a lot of different noises that my '09 5.3 didn't make).

If we're talking about an actual "clunk" that you can hear and feel, and you get it when going over some uneven surfaces, then I'm wondering if it's a loose spare tire.

Ah yeah, sorry maybe I misunderstood. My issue was definitely more of a clicking noise which you'd expect from a metal clip hitting something in the wind. I did not have a clunk or anything that could be felt as if something large was loose.

 

[WalleyeMikeIII]

There is a known issue w/ the clips that hold the exhaust heat shield coming loose or missing from the factory. This results in the heat shield vibrating and making noise in the wind. When the vehicle is cold, crawl under and see if the heat shields are snug...if not, head for the dealer.