With the cold weather this really exposes a weak or an exposed area in the electrical system.
The main battery ground if I remember is right under the pass side battery on the fender well if I remember correctly. water, grime etc then comes freezing weather.
Start at the ECM and inspect clean, all main battery line branches. and think in the last 5-6 months did you have any service or work done on truck.
Check that area if so for any clipped, tore or exposed. did you by chance notice when you tried to start that you would get the grid heater symbol on dash?
Did you notice when it did start the volts dipped down (during the grid heaters coming on)?
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