fuel pump could be bad, at 68K? yes. I'ts almost never the sump being clogged.
It could, however, be a bad ASD relay or a bad connection to the fuel pump. Probably just the pump though.
The fuel pump going bad ans Idle air control valves (won't start) are pretty common.
Careful that you don't nose around this forum too much and get scared by "dodge haters" threatening to burn their durango at the stake, or how the motors are so terrible. Seems there are some unhappy people in these durango threads, that Don't have any real backing in truth for their statements. For the most part, the Durango(any model) is as good as you maintain it.