Hey Joshua,
Not a problem getting what you need for your truck, I got ya covered. Here is the brake down.
You will need just over two quarts of the Severe Gear 75w-90 gear oil for the rear diff. I take it it is a 2wd?
The transmission is 5qts of AMSOIL's ATF fluid if you are just doing a pan drop filter change and refill. If you are interested in a complete fluid exchange then it will take 12qts.
That covers those. The engine takes 4.6qts of AMSOIL's ASL 5w-30 synthetic engine oil and an EaO23 oil filter.
That covers the engine, tranny and rear diff. If you have any questions just let me know.
I'm from Bedford Pa. My parents now live in Windber and I'll be heading up to visit them here in Aug.