I looked through my owner's manual again this afternoon. It's not there. It lists that the rear needs 75W-140 and the front 80W-90, but no amounts are listed. The only capacities listed are for engine oil and coolant.
Front is 3 3/8 us pints, rear is 4 1/4 us pints. Got it out of the service manual, but I know it is in the owners manual. I would go look, but my truck is buried in mud about 500 yards away from my house.