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Yes, that's right. On previous generations, the tank was larger. Silverado has it easier. There is an enlarged tank of up to 40 and even up to 45 gallons of the Titan company. But I haven't found such a tank in the Yukon
Ford and RAM had 36 gallon factory tank options for the 1/2 ton trucks but I'm not seeing them listed on their "build and price" tools anymore. As far as larger aftermarket tanks for the gas versions the searching I do online usually turns up in a dead end and I saw something on another forum or one of the manufacturers of such tanks (can't remember) stating that due to tightening regulations its almost impossible to make an aftermarket tank for the gas models that comply with government regulations.
In the USA, they changed the legislation and prohibited the installation of non-standard tanks of larger volume? Yes, I noticed that larger tanks are only available for diesel cars.
No, we have the ability to order any options
I regularly can go 475-500 miles in my Denali XL on the highway. At 19MPG, the 28 gallons will take you 532 miles if you go to the limit. I can easily get 19 on the highway. My City MPG is around 15.5-16; that yields a range of 434. If I drive all city, I usually go 325-375 miles and squeeze in 20-21 gallons.
I drive fast on the highway. With a speed of about 105-110 mph and I have a fuel consumption of 11 mpg. So the range on one tank is less than 300 miles
