It's also a great motor to buy based on what I wanted, other than the fact that they make it nearly impossible to add a larger tank.
I don't tow much, but I have since buying the truck. I'm not unhappy with the purchase, just unhappy with GM's decision here. They have a 5 gallon DEF tank (if I'm not mistaken) that gets deleted for the gas motors. So I don't get why they couldn't have given us that five gallons in if they have the room? It would have given me a range of 600 miles, which would have been perfect. Also, for others who tow long distances, it would give them a range of 300 miles while towing.