The redesigned 2021 Chevrolet Suburban is 1.5 inches longer and has 19 percent more maximum cargo capacity. The Suburban will be offered in six trim levels: LS, LT, Z71, RST, Premier and High Country. A 5.3-liter V-8 engine rated at 355 hp powers all trim levels except the High Country, which has a 420-hp, 6.2-liter V-8. A Duramax 3.0-liter inline-six turbodiesel is optional on all models except the Z71. Each engine comes with a standard 10-speed automatic transmission with electronic shift control.