Light knock when first starting in the morning

[Warriorpluto]

I have an 07 Yukon denAli and it has 113k miles. It has light knock at idle for the first ten minutes of driving then it goes away. Is it normal? I don't have the afm valley cover.

 

[02Lightning]

Piston slap, I would say normal for that motor.

 

[Buzzcut]

Piston slap is my guess and it happens on high mile engines of this type.

 

[Warriorpluto]

Oh ok I guess I shouldn't worry too much about it. Thanks guys. I'll try not to mod this truck. I do want atleast a cold air intake. Which one is worth getting?