2011 GMC Yukon random chirping/squeak issue

Hoping someone may have some insight as to where to go next for my issue.

I have a 2011 Yukon with the 5.3L V-8. 6 months ago or so I started to get a faint squeak from under the hood. Previously I had replaced the idler and tensioner pullies as a general maintenance item and not out of necessity. I thought maybe the issue was one of those pullies so I reinstalled the originals but the problem remained. I took it to a mechanic to have it fixed, they swore up and down that it was the actual tensioner so I had that replaced. Leaving the shop it started squeaking again. I pulled back in and they said it was the alternator, which I had replaced only a month prior with a new AC delco part because of a separate issue. I put the old alternator back on, problem still persists. Remove drive belt, it goes away. Also had the A/C belt removed and still heard the same squeaking – new belt is installed now(stretch fit belts are lame). After the tensioner replacement the noise did go away for about a month, but now it’s back at random times….see below for the current details.

That leads me into right now…the squeak is not constant and comes and goes as it pleases. I can start it up cold in the morning and it will be fine, then start about halfway to my office, then stop before I arrive. That same afternoon it may squeak as soon as I start it to go home and may or may not stop by the time I get home. I’m wanting to try the spray bottle method to determine if it may still be a pulley or something else but everytime I go to try to diagnose it, it wont do it.

Anyone have any suggestions outside of gas and a match? I am tired of tossing money at this problem but I want to fix it before it becomes a bigger issue and leaves me stranded somewhere.