It is a 75w90 synthetic gear oil.
It doesn't have an oxygen sensor.
Wherever you poke the hole. :)
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.
Remove transmission oil pan for filter access
The speedometer signal comes form the abs sensor on top of the rear axle.
Ask your dealership for a 2006 diagram for the same vehicle.
If equipped, it is on the passenger side. It starts behind the oil filter. It was an add on option when the truck was built.
Trouble code P0236 means:Turbocharger boost sensor A circuit range/performance
ATF+4 automatic transmission fluid
it takes 6 qts
On top of the dryer (black can) near the firewall on the passenger side of the truck.
48re