Until the GMC Hummer EV makes its debut in the fall, the 2020 GMC Sierra Denali Heavy Duty pickup truck totes the truckmaker’s banner as a flagship. It’s suited to the task. Up to three tons of anything can be heaved into its boxy rear bed, or it can tow …
Read More »First drive: 2020 GMC Sierra 3500 Denali eclipses its former self
