Dealer replaced all power cables from the battery. Waiting to see the results. I'll let ya know!
Jim

 

Vehicle has had 0 incidents since replacing positive battery cable from battery to started and junction block. apparently that hadn't ever been replaced.

 

The Plug on the main 12V cable to the UBEC is a quick connect plug I bet the blade began losing tension. These damm new cars have so many things that can cause identical symptoms will drive a tech or customer to drinking trying to nail down glitchy dang little problems.

 

So far so good. You would think the newer computerized everything cars would have a solid electrical supply??? I guess GM thought they could save a nickle or two with their cheap connectors. Anyway day 9 and no abnormal electrical problems. I'll be back later with an update.

 

I'm kind of late.

The factory battery cable ends that GM used are complete garbage. After a couple electrical problems with my truck. I replaced the battery cable ends on my truck with brass and have had zero issues since. I could have had mine replaced under warranty but didn't want the same factory junk.

 

Well it would seem a bad connection was the problem. Time will tell.