2015 Sierra 5.3 Cat Rattle

[leestopher187]

I have a 2015 sierra with 4k on it. I have a rattle inside the 3rd cat just before the exhaust hooks on. The rattle sounds like marbles in a tin can. What should I do?

 

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[dsr611]

2015 with 4000 miles? Take it back to the dealer and let them worry about it...that's what a warranty is for. Come warranty expiration time, GM won't be there for you.