I can’t locate a clunk noise, and have heard of electronic remote listening devices to help, I would like to rent one
http://www.etoolcart.com/index.asp?PageAction=VIEWPROD&ProdID=1937
I believe this is what you’re talking about. And to tell you the truth, I don’t know of anyone who rents this tool.
Tester
It could be from the air conditioning system. Doors are always clunking. 02 GMC Sierra.
Something rolling around in the trunk? (If you have one?)