2015 YukonXL chirping sound when accelerating

[Gmjunky]

Every time I accelerate I hear this chirping sound. It's not instant when you hit the pedal, it has a 2-3 sec delay.

The best way to duplicated is cruising on a 45mph zone foot off the pedal, then step on the pedal about 1/8 or half way.

 

Let's see what DL finds.

[rocknfire]

It's the flapper valve in your exhaust system.

[Gmjunky]

This didn't get fixed before it got replaced with a 2016.

 

Hope the new one doesn't develop this.

[Woodtrey]

I have the same muffler baffle issue with my 2015 Suburban. I was glad to hear them say they would replace it. They did. When I picked it up the service manager asked the parts guy to check if had a new part number. Well it didn't. So after a week the chirp came back. Now that they do have a new part number but they're telling me they need to contact Chevy to get the replacement approved. Basically giving me the runaround.