Kind of a silly customer complaint: the USB charging ports don't work in this 2016 Buick Envision.

After checking the basic Power and Ground at the "USB Hub", I found a TSB that describes the USB Hub failures. Must be a bad USB Hub, right?

WRONG!!

Had to do a second visit to the shop to complete the diagnosis.

WHAT DID I MISS??

LAUNCH X431 PRO3S+
https://www.amazon.com/dp/B092894STV?...

ASTRO DC AMP CLAMP:
https://www.amazon.com/dp/B08MTCMWLB?...

Enjoy!
Ivan