the National Defense comment was worth a laugh - thanks for the explanation and advice. Not sure when I'll get the truck back (still haven't heard from the shop yet this week), but you all have convinced me to get a better battery when I do.
Thanks for the reply - that certainly makes sense to me. So much so, that I suggested that solution to the dealer maintenance manager. The reply was that the battery "checked good". Given that they can't provide what did not "check good", we're more than a little frustrated by their refusal...
Thanks - may have to do that. I did verify we have the -800, which seems to recommended over the -760 on some other threads reporting similar issues. Maintenance says they've done several deep cycle tests and the battery passed all.
6 weeks old, 650 miles. Drove 2 hours Sunday, vehicle completely dead when I started it for work Tuesday morning. No app notification for deep sleep mode.
It's been in dealer maintenance for a week, all diagnostics and TSBs done with no findings. Any ideas?