Hi everyone,

I have 2016 Suburban with 65k miles.
starting around 62k after a road trip, I am hearing whining noise and some weird knocking noise from the engine and it's really bugging me. It kinda gets worse when it is colder outside.
with engine warming up, it gets better but whining noise is there.
when driving, there is kinda light knocking sound with rev, with higher speed it gets faster.

I am not sure but it seems like my oil pressure is lower than usual (have not checked when it was normal). its around 18~22 when idle, 30~40 with higher rev.

hereis video with sounds. if anyone experienced, please let me know what cause was.