Counterclockwise
36 mm wrench and a spanner to hold the pulley. Turn counter clockwise to loosen.
48re
It did from the factoryIt did from the factory
It doesn't have an oxygen sensor.
12 quarts
Approx 9.5
12 quarts 15w40
It is part of the fuel filter on a diesel.
A/C clutch relay circuit.
Remove the shroud and the fan. loosen the clutch bolts .... not always easy. We have more detailed instructions at our enthusiasts website. www.trailvoy.com
It will run on any diesel sold at a gas station. In colder areas they blend diesel so it does not gel (freeze) in the truck.
It is a 75w90 synthetic gear oil.