Good luck, hope it's just the battery.@gti16vman Awesome! Thanks for the link, super helpful.
Edit:
I got the gauge programmed but haven't tested it yet actually going anywhere. Reads 15 in reverse, 1 in Drive, 0 in park/neutral.
Before getting it set up though, I snagged my dad's meter (and my dad) take some battery measurements. Started the vehicle from cold, sitting overnight, with 47F ambient temperature. Turned the truck on twice, with the voltage drop measured at 9.884V and 9.54V on the sequential starts. The cold battery hung out at 12.146V and the alternator kept it up at 14.266.
View attachment 434541
I also took 3 short trips of 15, 1, and 14 miles, all with no issues. I mean, who doesn't like to chase intermittent problems?