According to a GMC spokesperson, the Hummer EV will not have the MPGe ratings on the window stickers. Apparently a vehicle that has a GVWR of over 8500 poiunds isn't required to display MPG or MPGe numbers.

A GMC spokesperson confirmed to Car and Driver, which obtained the company's application for certification with the US EPA, that it would not be displaying the fuel economy rating on the Hummer EV's window sticker. General Motors has other large electric vehicles in development, like the Silverado EV, that might toe the line between displaying the rating or not. A model with a gross vehicle weight rating (GVWR) over 8,500 pounds (3,855 kilograms) isn't required to display the fuel economy rating, which is measured in MPGe – miles per gallon of gasoline-equivalent.

The application lists the Hummer EV's GVWR rating at 10,550 pounds (4,785 kilograms) with a 9,063-lbs (4,110-kg) curb weight. Both of those figures are far above the 8,500-pound threshold, and nearly 3,000 pounds are dedicated to the battery, which weighs in at an astounding 2,923 lbs (1,325 kg). As Car and Driver notes, the Rivian R1T also has a GVWR of just over 8,500 lbs; however, Rivian does display the truck's MPGe rating on its window stickers.