GMC ≫ SierraGMC Sierra SLT (2019, fourth generation, launch) photosby Joshua ThompsonThe 2019 GMC Sierra SLT is available with a 5.7 or 6.2-liter V8, and a 3-liter V6 turbo-diesel. It is based on the Chevrolet Silverado but has unique front styling. ◄ PrevNext ►Credit: Steve Fecht for GMC 2019 GMC Sierra SLT Tags:fourth generationgmcsierraslt