To find it, you should:
* Consult your owner's manual: This is the best place to start. The manual will show you a diagram of your specific truck and the location of the block heater.
* Look closely at the engine block: Examine the entire engine block, especially the lower areas and sides. Look for a heavy-duty cord and plug that's noticeably different from other connectors.
* Check near the oil filter: This is a common location for the block heater.
* Use a flashlight: The area might be dark and hard to see.
* Search online forums: Search online forums specific to your year and model of Dodge 3500 (e.g., "2015 Dodge 3500 block heater location"). Someone may have already posted pictures or descriptions of the location.
If you still can't find it, consider taking your truck to a mechanic. They will be able to quickly locate the block heater plug.