The radiator drain plug on a 2001 Dodge Ram 3500 with a 5.9L Cummins diesel is located at the
bottom of the radiator, typically on the driver's side. However, its exact position can vary slightly depending on the specific radiator used. You'll need to look carefully at the bottom of the radiator; it's usually a small, threaded plug. It may be a petcock-style valve, or a simple bolt.
Important Note: Before attempting to drain your radiator, consult your owner's manual. It will give the precise location and any specific instructions for your truck's cooling system. Always work on a cool engine, and use appropriate safety precautions like wearing gloves to protect against hot coolant.
