Rattle in back cargo area

[thoover74]

Yes, I have read a lot of threads and haven't found my answer yet. I have plastic rattle at idle at when someone sits in the cargo it appears to come from inside the passenger side cargo wall near the taillight. Here is where it gets interesting, it does not occur when the SOT is open or the rear window is open or the tailgate is open or the passenger side rear window is out. I have played with panels inside the wheel well, tailgate door, the tailgate window, the spring on the SOT but to no avail.

It is odd when the items above are open it doesn't it occur. Again only at idle or right above idle. Any thoughts would be helpful, it definitely sounds like plastic vibrating.

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[Outwest]

I have a factory rear steel bumper and it causes a vibration rattle and echoes in the rear cargo area.

 

[thoover74]

I do have a factory steel bumper. Just accept it or tighten something?

 

[au176]

You can pick up a mechanic's stethoscope for around $20. I use one at work often. They are pretty good at finding noises in a machine.

Use the funnel to pinpoint the general are of a noise, then put the metal probe on it to find exactly where the noise is coming from by touching it to parts in the area. I'm guessing one would work well in these situations.

https://www.amazon.com/Lisle-52500-Mechanics-Stethoscope/dp/B0015DLMOO/ref=sr_1_3?crid=3OI78P3KGJPFB&dib=eyJ2IjoiMSJ9.jCV8djQ753Th_nIJc0j1Mh-jqCnEcMEcFMAqs5RgEc2rVVv3-hB7x0EgH6Hlwa-uTwfdbLAc_qN9azKn5NtVbdHA0lxaYASKE6FmSsCNMThEB3T8GEcjyorxlpkDqVSKzdrnICDSEYx4yeyaN9SbvYB1ImpIE6E73bTVJrlq3rvJVXvCkgTb57Mi3JaaA5mzGDBxh4nVKRoOzZM5C8D2hwid73QlFNwiSkv_KgC_Vq0.1st1JkoH3xpPEnhKtCmssKOazAoz2KxSrKvEDuWDGmY&dib_tag=se&keywords=stethoscope+probe&qid=1732154117&sprefix=stethoscope+probe,aps,121&sr=8-3&th=1

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