Borla exhaust letting off rattle at medium-heavy acceleration VIDEO

[denali17gmc]

Went through GM dealer and got the Borla exhaust for my 2017 Denali 6.2. I'm getting this rattle(woodpecker) sound when at a medium to heavy acceleration for a few seconds.
Any ideas?

I've gotten under the truck and the exhaust seems to be secured properly so it leads me to believe its within the actual muffler...

 

[TechSupport]

How many miles since you installed the exhaust?

 

[denali17gmc]

How many miles since you installed the exhaust?

I'd say just under and thousand. Got a reply from borla today and they think it's a failing valve. Representative said they should be replacing it under the warranty, just waiting on their reply after I sent them over the original invoices.

 

[TechSupport]

I have the s type on my Escalade. It was loud and uneven sounding I called them and they told me to go beat on the truck to break it in and season it. It's sounded great ever since. Good luck with yours.

 

[humer101]

I have the s type on my Escalade. It was loud and uneven sounding I called them and they told me to go beat on the truck to break it in and season it. It's sounded great ever since. Good luck with yours.

My dealer install my S-type on my Denali today and the sound is amazing it feels like a race car wow.

 

[cardude2000]

Is the one on the gmc accessory page touring or sport?


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[humer101]

Is the one on the gmc accessory page touring or sport?


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No is not in the touring or sport package is just one more accessory is worth every penny.

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[cardude2000]

No is not in the touring or sport package is just one more accessory is worth every penny.

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I'm asking which borla it is. The sport or the touring.

 

[humer101]

Oooooo my bad S-Type

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