To find it, you'll likely need to:
* Consult your owner's manual: This is the best place to start. The manual should have a diagram showing the location of the AC drain.
* Look for a small rubber hose: This hose is usually about 1/4" to 3/8" in diameter and may be tucked up against other components. It will often be connected to a metal fitting or a small plastic tube.
* Check near the evaporator case: The evaporator case is part of the AC system inside the cabin, and the drain line exits from there. You might need a flashlight and potentially some maneuvering to see it from underneath the truck.
* Use a flashlight and possibly a mechanic's mirror: This will help you see into tight spaces under the dash and along the firewall.
Important Note: Never attempt to force or damage the AC drain line. If you cannot easily locate it, it's best to consult a qualified mechanic. Improper handling of the AC system can lead to leaks and other problems.