The Chevrolet Silverado HD has been updated for the 2024 model year, and included among the updates is a new ZR2 grade. ZR2 is the brand’s designation for off-road-ready pickup trucks, and the Silverado HD ZR2 is a heavy-duty truck that will happily hit the trails as well as tow and haul all of your gear. It will be offered exclusively in the 2500…