Steve Suburban

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

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