2016 silverado knock, detonation

[Svonpress87]

I'm not sure what this is exactly sounds like detonation to me. It only happens occasional at startup or taking off from a light. I can however "duplicate" the problem by putting it in park and giving it a little gas to free Rev. As soon as I press on the throttle I get that noise. I have had my truck to dealers numerous times with the typical unable to duplicate problem truck has stalled on me multiple times and stumbles so bad at a stop idling when I'm ready to go again truck won't because it's running so rough. Mainly happens after 2 hour + drive. Watch this video