2019 Silverado 1500 5.3L Anyone know what this sound is?

[dlenk5698]

 

 

Hey guys.

 

Just really stumped here and never got to the bottom of this. I’ll post a video and in that video I was curious what that fluttering/ticking sound is when I’m only on throttle? Is it the hpfp? Manifold leak? Or is this normal. Feel free to ask any more questions to get a better idea. 
 

edit: 
 

windows down:

https://youtube.com/shorts/H7UPcljXE_M?si=dWSUeyZBbD8uDOdn

 

windows up:

https://youtube.com/shorts/voeOH1NHV-M?si=5vWRHW5FwOoRbkpP

Edited February 17 by dlenk5698

[Jsdirt]

Can't see the vid. Your chances of success will be higher uploading it to Rumble, or YouTube.

[dlenk5698]

9 hours ago, Jsdirt said:

Can't see the vid. Your chances of success will be higher uploading it to Rumble, or YouTube.

Thanks for the heads up. Just posted links to YouTube for you. Thanks in advance

[Jsdirt]

That's just the AFM (Active Fuel Management) working - that's what I hear. Sounds like you've got an aftermarket exhaust, so it is amplified. With the stock system it is undetectable by most people.

 

On these '19's I believe it is more than just 4 cylinders deactivated, depending on the load, as with the previous generations (2007-2012). More cylinders getting taken out will also amplify the noise a bit with an aftermarket system.

[dlenk5698]

1 hour ago, Jsdirt said:

That's just the AFM (Active Fuel Management) working - that's what I hear. Sounds like you've got an aftermarket exhaust, so it is amplified. With the stock system it is undetectable by most people.

 

On these '19's I believe it is more than just 4 cylinders deactivated, depending on the load, as with the previous generations (2007-2012). More cylinders getting taken out will also amplify the noise a bit with an aftermarket system.

I have an afm/dfm disabler so I don’t think it’s  that. Also I just did a muffler delete but I heard it when it was stock too.

[GMCustomerService]

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