An all-new Sierra HD follows the 2019 all-new Sierra 1500. The Sierra 2500 and 3500 have a new standard gasoline engine and the diesel gets a new transmission. The GMC Acadia gets a refresh, a new engine and a new transmission.
New Sierra, Black Editions, bye-bye stick and more details about all the new GMC trucks for 2019.
All of the 2018 GMC model changes in one place! So far: Acadia, Canyon, Sierra, Sierra HD, Yukon and the all-new Terrain.