The air filter is cheap, easy to do yourself, it is under the hood, and it is connected by tubing, and in a box. Take off the clamps and remove the hood.
The gas filter is under the truck and not as easy as the air filter, you need line wrenches to remove, and it could get rather rusty and stubborn to remove,.
It is a round cylinder connected to the fuel line.
The air filter: about 20.00
the fuel filter : about 25.00