6.9 #1 has a long-term issue where the start motor will sometimes spin but not crank the engine. "Remedy" at present is to simply retry starting, at which point it will either crank correctly or the above will happen again. Happens at most 3 times in a row. I can't figure out any trends - happens sometimes when hot, sometimes when cold (both weather and engine).
Assume this will eventually get worse and cause a failure to proceed?