yes and plan to service trans and change fluid in rear end when i get it
Leave the rear diff, I'll make you a list. Check it against the service manual in the glove box, should be spot on. Rear diff, transfer case, and front diff shouldn't need it until at least 70k.
30k serviceFuel filter
transmission service (Dexron 6 fluid and ACDelco trans filter)
engine oil and filter change (I'd reccomend Mobil 1 5w30 and ACDelco filter)
lube front end suspension
Checkair filter
PCV valve
brakes
That should be plenty of a start for that truck.
Then we can start doing the leveling kit and exhaust.