Help diagnosing this noise please.

Only shows up during the warm up. Varies in pitch. All fluid levels are good and truck drives great.

2015 5.7

https://youtu.be/GJWU_3ujPRE

 

It’s normal, a lot of people and myself have the same noise whenever it dips below 30 out. I haven’t seen any threads that have pinpointed the noise. But I think it’s the SAI.

 

Mine does the same, I used to be worried about it but the truck runs great so I guess it's a non issue. These 5.7's can be noisy due to the valve train.

 

Mine makes a similar sound. Mine isn't quite as high pitched as yours seems. Mine sounds like a damn goose honking when it warms up. I replaced the serp belt and tensioner and it seemed to go away for a while, but alas it is back again. Annoying AF.