2016 Tahoe Z71 - Gauges turned off, kept driving OK. Shut off now won't start?

[ezmoney1981]

Will do my best to keep this concise and share pertinent info only:

I was driving my 2016 Tahoe Z71 with 111,000 miles home from 2 hours out and 100 miles. I stopped for gas about half way, filled up, no issues.

About 10 miles out, I noticed all the gauges were full lock left, reading 0. All of the sensors flagged alerts. Wipers, parking, ABS, airbags, etc. Center console had carplay on, and kept working. I thought that's weird, maybe I should stop and turn off the car, and when i turn it back on it will effectively "reboot".

I pulled off the freeway with 5 miles to home, pulled over to a safe spot with a shoulder and what not. Turned the vehicle off. When I went to turn the vehicle back on, nothing, some tapping (not clicking like a starter), and the dash did not light up.

AAA battery car came, checked battery, which was good. We both assumed it was a bad alternator.

Waited for the flatbed, with no juice, he couldn't even get it to move in to neutral. It was that dead/non operable.

Got a new alternator in preparation. Removed the old one, took it to O-Reilly to test it, they said it tested GOOD. Shit.

Pulled out the battery, tested it, 12.8v, a little low but also GOOD.

Checked the big fuses, GOOD (as far as I can tell).

Tried to connect a cheap OBDII reader I have, shows 0 codes. Great.. Also notice the climate info is in Celsius? Weird.

Open to any and all ideas!! Not good.

 

[Big Mama]

I had a Sierra do the same thing. Turned out to be an overcharging alternator that toasted the battery. When I stopped to get it check Auto Zone said both were good. When I got home to my own testers is when I found the issue.

 

[Doubeleive]

Will do my best to keep this concise and share pertinent info only:

I was driving my 2016 Tahoe Z71 with 111,000 miles home from 2 hours out and 100 miles. I stopped for gas about half way, filled up, no issues.

About 10 miles out, I noticed all the gauges were full lock left, reading 0. All of the sensors flagged alerts. Wipers, parking, ABS, airbags, etc. Center console had carplay on, and kept working. I thought that's weird, maybe I should stop and turn off the car, and when i turn it back on it will effectively "reboot".

I pulled off the freeway with 5 miles to home, pulled over to a safe spot with a shoulder and what not. Turned the vehicle off. When I went to turn the vehicle back on, nothing, some tapping (not clicking like a starter), and the dash did not light up.

AAA battery car came, checked battery, which was good. We both assumed it was a bad alternator.

Waited for the flatbed, with no juice, he couldn't even get it to move in to neutral. It was that dead/non operable.

Got a new alternator in preparation. Removed the old one, took it to O-Reilly to test it, they said it tested GOOD. Shit.

Pulled out the battery, tested it, 12.8v, a little low but also GOOD.

Checked the big fuses, GOOD (as far as I can tell).

Tried to connect a cheap OBDII reader I have, shows 0 codes. Great.. Also notice the climate info is in Celsius? Weird.

Open to any and all ideas!! Not good.

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your first clue if you haven't fixed this already is you have no voltage, so that means one of more of those battery top fuses may have a took a dump or one of the cables connected to it are bad. or you may have a really bad ground somewhere, you need to get a meter out and start checking starting at the battery.