Final answer:
To safely deflate a truck tire, the best method is to remove the Schrader valve core completely using a proper valve core removal tool. Using a screwdriver or fracturing the valve stem is dangerous and can damage the tire.
Step-by-step explanation:
The recommended method of deflating a truck tire is to remove the Schrader valve core completely. This allows the air to escape in a controlled and safe manner. Using a tool like a valve core remover or other specifically designed tool for this purpose is advisable. The valve core is the small, usually metal, component that you see when you remove the cap from a tire's valve stem and it controls the flow of air in and out of the tire. It's important for safety and to prevent damage to the tire to deflate it properly.
Using a screwdriver or fracturing the valve stem is not recommended because these methods can damage the valve stem or the tire itself. Moreover, it's important to avoid methods like separating the bead of the tire from the rim, as this does not control the release of air and can be very dangerous.