2016 Tahoe LTZ 140k - Houston TX

[tom3]

When it does this I'd turn on the headlights manually for loading and indication, leave doors open, then get under the hood and start twisting wires while looking at the lights shining, not shining, on the wall or something. When you find it you'll know it.

 

[houstontaylor]

I have heard of that happening with a corroded engine ground cable.

 

[Apple Pie]

Years ago, I had a similar problem. There was a ceramic post to fasten the ground wire that had a hairline crack. You could not see it and it functioned while the car was running in the shop. When driving, the slightest bump in the road caused it to lose continuity to the electrical system because the ceramic insulator would open just enough to short out the system and then go back to looking ok and you could start it again. Just sayin’.

 

[DogsRFun]

Does "loss of power" mean the engine dies, or just limp mode?

For example, if my body loses power it can mean that I got weak, or that I died.

everything shuts down - no power - total blackout.

 

[DogsRFun]

When it quits do you lose electrical power? Or does the engine just shut down.

all power is lost / system failure or shutdown / it's like the battery is removed - nothing cranks, runs, illumines. within a couple of minutes it'll start and all of my settings are still saved (seat, radio, ac temp) unlike a battery change where all settings must be reprogrammed