* Inertia Switch: This switch, often located under the dash or in the engine compartment, cuts off fuel flow in the event of a significant impact. It's designed to prevent post-crash fires. This is likely the closest thing to a "fuel shut-off" integrated into the vehicle.
* Fuel Pump Relay: The fuel pump is controlled by a relay. A malfunctioning relay can prevent the pump from operating, effectively cutting off fuel flow. This is not a manual switch but part of the normal electrical system.
* Other safety features: The fuel system itself includes pressure regulators and other components to prevent fuel leaks.
To find the inertia switch: Consult your owner's manual for the exact location. It may be labeled, but sometimes it is simply a small, resettable switch. If you can't find it in the manual, a quick online search for "2000 Dodge Durango inertia switch location" should provide images and instructions.
Important Note: If you're experiencing fuel-related issues, do not attempt to disable the fuel system yourself unless you are a qualified mechanic. Incorrectly tampering with the fuel system can be dangerous. Have a qualified professional diagnose and repair any problems.
