24 3.0 Duramax - metallic scraping when engine hot

hi! i just found this post, I noticed this "buzzing" from the exhaust today. Were you ever able to take it in? I am only at 1200 miles so no where near a oil change and I hate to drop off the truck when it might be a couple weeks until they can diagnose it.
 

hi! i just found this post, I noticed this "buzzing" from the exhaust today. Were you ever able to take it in? I am only at 1200 miles so no where near a oil change and I hate to drop off the truck when it might be a couple weeks until they can diagnose it.
So I did take it in and I was told it’s “normal”. Found some info in the r/gmcsierra

I bent back a heat shield and it minimized the buzzing from the front end. Intermittently I hear some near the spare wheel so I’ll be looking at that next
 

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