Failing oil pump??

[BlackJack997]

Ok, so I'm in a 22 Silverado 1500 LTD 2.7 with 88K miles. For the last 2 weeks I occasionally will start the truck and hear a whining noise, accompanied by the oil pressure gauge moving back and forth. After 5 mins at idle, it smoothes out and I won't see it again all day. It's not an every time I start problem. Any ideas?? Can't really hear the noise in the video, but gauge dancing is shown....

 

[silveradosid]

a whining noise could be a lot of things, so you need to locate where it is coming from. could be transmission, turbo or even a belt tensioner. open the hood and trigger the latch closed and start it to try and locate the source of the noise. have you checked the oil level