To find it, you'll need to:
1. Look underneath the truck: You'll need to get under the vehicle to see the radiator clearly. Use jack stands for safety.
2. Locate the radiator: It's a large metal unit at the front of the engine compartment.
3. Examine the bottom: The drain plug is usually a small, threaded plug near the bottom of the radiator, often towards the driver's side. It might be a different color (like brass) or have a slightly different shape than the surrounding metal.
If you're unsure, referencing a repair manual specific to your 2002 Dodge Ram 1500's model and engine would be the best way to pinpoint its location. A picture diagram would be particularly helpful.