Loud 2014 Sierra 5.3 Noise

[daviddsims1]

My 2014 Sierra with the 5.3 has approximately 110k miles on it and has had no major issues to date. Over the past 10-15k the truck has gotten significantly noisier after startup and also has a weird sound under the hood when accelerating especially cold. It's hard to describe the noise but it sounds sort of like a squeal and it correlates directly to how much I push the throttle. It does seem to quiet down after the first few miles driving. This noise was never there and has now developed over the past few months worse. I'm using 0w-20 oil and even switched to 5w-20 this last oil change to see if it helped. Any ideas what could cause what I'm hearing?

[Mike GMC]

Have you ever replaced any of the belts or tensioners?  Might be belt squeal or a tensioner bearing going bad.

[DeePa]

What’s your oil pressure?

[daviddsims1]

Oil pressure appears normal but I have never changed drive belts or any bearing in the tensioner. It very well could be that, any easy way to check that?

[Mike GMC]

Take the belt off and see if it still makes the noise.  Spin the tensioners by hand, if they are quiet and smooth, great.  If not...  Then spin the water pump and alternator to see what they feel and sound like.