The filter is inside the frame rail on the drivers side approx next to the drivers door. There is a special clip that slips inside the fitting to release it. The clip sometimes comes with the new filter, it is however not very good. You can buy the proper tool at most parts supply houses for under $10.00. You slide it inside the fittingoutside the steel line and it releases a clip inside. You then pull the line out.
I don't think 1999 F150 had a cabin air filter option. I have never seen an F150 with a cabin air filter, and all the guys around here I have asked have never seen one either.
An 08 F150 Harley Edition does have a cabin air filter located on it. Furthermore, the F180 Harley Edition has a fuel filter located in the engine compartment.
What year? 2001
I had a 99 F150 4wd with a 4.6L engine. The filter was located in front of the driver's side front tire, attached to the frame rail.
http://www.ford-trucks.com/forums/467008-how-to-replace-your-fuel-filter-on-a-2004-and-newer-f150.html?highlight=fuel+filter There is a great tutorial on it. MAKE SURE YOU DO NOT BREAK THE BLUE CLIP ON THE END OF THE FILTER CONNECTOR. I did, and it's going to be a pain to get it!
Its located near your air filter box
forward of the firewall
It is located under cab on drivers side on inside of rail.
Where is the gas filter located on a 1995 F150XL pickup with duel gas tanks?
6 quarts ( 5.7 liters ) WITH FILTER CHANGE
6 quarts with filter change