Mystery engine noise 2020 Suburban, any ideas?

[Steve Suburban]

Brand new truck with 3k miles and hearing all sorts of unnatrual noises from the engine under load, not sure if spark knock, lifter tick or what...

 

At 4 seconds into video some noise "kicks in", I hear this pretty much at any speed when under load...

 

And at heavier acceleration I get the noise you hear at 5 seconds into this video...

 

Thanks in advance 

[CamGTP]

I couldn't hear anything other than just normal engine sounds. These trucks with the intake air baffles and exhaust will have that kinda rumble to the engine note.

[Steve Suburban]

10 minutes ago, CamGTP said:

I couldn't hear anything other than just normal engine sounds. These trucks with the intake air baffles and exhaust will have that kinda rumble to the engine note.

The video may just be hard to decipher but there's definitely something off. I've been driving L83 5.3 trucks for years and never heard these sounds. There's background noise in the vids but the sounds are there. Feels terrible under hard acceleration 

[gearheadesw]

The dealership, unfortunately, is the place to go for this. Give them a ride , show off your noises.