http://www.sylvania.com/ConsumerProducts/AutomotiveLighting/LampReplacementGuide/
From here you will establish the fact that the truck takes a
9006 bulb for the low beam
and a
9005 for a high beam bulb.
You should be able to cross reference this on the information provided
with the hid manufacturer.
Short but simple,
Hope it helps....
Good Luck with your upgrade.
