Ram 3500 will not start

Hi, I'm one of the auto experts on RepairPal's Car Genius team! Sorry to hear you are having issues with your truck. From what you are describing with the starter on your Ram 3500 clicking once but not turning over the engine and starting, it sounds like your starter itself has failed. The click tells us it is getting power and its is trying to activate. You can confirm that it is getting proper voltage, and that the engine is able to turn over by hand. But outside of that, it points to needing a new starter. If you need any further advice or would like help finding a trusted RepairPal shop in your area or even getting an appointment booked, please feel free to call us at 877-913-1554 or check out https://repairpal.com/certified