Going on a year now with our 2013 Silverado 2500 Duramax 2wd, towing a 31' Fvr. Tow/Haul-Exhaust brake combo has been excellent so far. Smooth/Quiet driving for a diesel. Average freeway Mpg. (no load) shows 21-22 on the Driver Information Center. Have seen 13-16 mpg on the DIC while towing on the freeway. Previous TV had a 8.1 liter gas eng. Got 6-7 mpg. towing. Love the torque the diesel puts out. Have doubled my MPG while towing. Very impressed. Going on a 1 1/2 month trip June 7th. to Idaho, Montana, So.Dakota, Iowa. Will be a good test for this TV. Hope you find the right TV for your application!!