Near as I can tell the chirping seems to come from injector pump. All stock and never been torn into to my knowledge. 275k + miles.
May be hard to hear on video. Thanks for help any and all !

 

I didn't see a video, but when I hear the words chirping and 12v Cummins motor used in the same sentence...my first thought goes to serpentine belts, belt tensioners and wallered out grooves on fan hub pulleys.

 

Yes sir Mr. Foster,
Guess I posted before the file attached. Then computer or internet wouldn't cooperate!
Trying again here!

 

Remove your serpentine belt and fire the motor back up...if the noise goes away then you know it's one of the belt driven accessories and not the IP.

 

I love this plan.