I drive a 06 Chevy 2500 with the 8.1 gas engine and Allison trans for the last 7 years. I get 13 miles empty and no worse than 11 mpg towing no matter how heavy! I can tow with any diesel 3/4 ton out there without all the maintenance costs and high priced diesel. Also when I bought it I paid about 10K$ less for it than the same truck with a Diesel engine. Never had any issues, I just keep my oil changed and fluids and filters fresh.
Better look again. The 2019 Ram 2500 can tow up to 19 800 lb, the 3500 maxes out at 35 000lb. Unless I'm mistaken, I'm not sure any '06 truck, whether 2500 or 3500 could tow that much.
