O.k.,most common to replace for a tune up on this vehicle is the spark plugs,spark plug wires,fuel filter
,engine air filter
You can locate the engine air filter box by following the tubing from the throttler body on the engine to the air filter box,you can replace the air filter in this box here.Usually the box will separate so the air filter can be removed and replaced.
The fuel filter is located under the vehicle on the drivers side,if you follow the fuel lines under the vehicle you will locate the filter assembly,it is shaped like a cylinder and should have quick release fitting fuel lines on it that need to be removed with quick release fuel line removal tools.Once the lines have been removed then the fuel filter can be slid out of its bracket and replaced.
The spark plug wires do not need replaced usually on this vehicle unless they are causing an engine misfire and are arcing,these wires are actually short spark plug wire boots that attach to the coils and run down inside the valve cover to the spark plugs.The coils are located on top of each valve cover,they are large assemblies that are usually held in place with some small bolts,remove the bolts on these coil pack assemblies and disconnect the electrical connectors plugged into them and lift off and remove the coils.
Once the coil packs are removed you can then remove the rubber spark plug wire boots from the valve covers and then use an extension and a 5/8 spark plug socket to insert into the valve cover holes where the plug wire boots were and remove and replace all 8 spark plugs.
I apologize as I don't have any pictures available to post here for these procedures.Let me know if you need anything else.
Hope this helps, and please remember to indicate that I have helped you today.