Hi Everyone,
I see there are many good questions, thoughts, comments on here about the new gm hd trucks with the 6.6 gas. I also hear comments, questions, elsewhere in person and online about these new trucks but not many speaking from actual experience. I own one of these new trucks and have to say it has been great and love the truck, i purchased a 2020 chevy 2500HD LT Z71 crew cab with 6' 10" box with the 6.6 gas engine, w snowplow prep package and gvwr 10,650 lbs. I use this truck everyday for commercial use and tow trailers every single working day. The truck has performed beyond my expectations. Plenty of power and torque, capability and the fuel economy can be excellent, i feel this gas hd truck engine is a game changer in this market, i have put 22,000 miles on this truck and my best mpg was 21.9 mpg unloaded driving at speeds of 55 to 60mph, worst mpg 7.5mpg was pulling a 33ft travel trailer 9,000 lbs across north dakota with 25 mph + headwinds with gusts, average mpg highway unloaded is 18 to 20 mpg depending on fuel, wind, speed, driving habits other variables, average towing pulling rvs which drag tons of wind and hurt mpg greatly is 8.5 to 10.5 with 6,000 to 12,000 campers. I also changed stock tires for LT 275/70/18 cooper discoverer st (33") which is same size as stock but aggressive, my favorite truck tire the past 20 years. I have a 36 gallon tank and unloaded have drove up to and over 600 miles on a single tank.
