2016 GMC Yukon Denali 6.2L Ringing Noise

This ringing noise started under mild to moderate acceleration at lower speed on my '16 GMC Yukon Denali. I first noticed it at 600 miles. Two trips to Ewing Buick GMC in Plano, TX have yielded no results.
UPDATE: On 09/20/2016, Ewing Buick GMC performed PIP5395A for a sticking fuel feed pipe check valve. I'm still dealing with issues I believe are related to this or possibly a clogged/bad injector. See my latest video for that at the following link. • Engine Noise 2016 GMC ...
PIP5395A: gm.oemdtc.com/6...