Originally Posted by cobblestone1820
Do you think I should push the button to take it out of O/D while towing?
There are different schools of thought on that issue. I believe if you have enough truck for the load that you can leave it in OD as long as it doesn't start "searching" for a gear. If it's shifting back and forth, take it out of OD. I'd also take it out of OD on hills, both up and down, as you can use the engine braking to assist with brakes.
You're doing the right thing here asking for answers before you learn on your own - the hard way!