To find it, you'll need to:
1. Identify your transfer case: Look for a tag on the transfer case itself, or consult your owner's manual or a parts diagram online using your VIN. This will tell you the specific transfer case model.
2. Consult a repair manual or online resources: Once you know the transfer case type, search online (e.g., using Google Images or YouTube) for "[Your Transfer Case Model] drain plug location." Many repair manuals and videos will show the exact location.
3. Visually inspect the transfer case: With the truck on level ground, look underneath the vehicle, focusing on the transfer case (typically located near the transmission). Look for a bolt or plug that is likely to be a drain plug - they're usually a slightly recessed, magnetic plug on the bottom of the transfer case. Be cautious when inspecting the underside of the vehicle.
Important Note: Before attempting any work on your transfer case, ensure the vehicle is properly supported on jack stands and that the transfer case is cool to the touch. Working with hot fluids can cause serious burns.