Question: what is the difference between the 2019 and 2020 gmc sierra?
Answer: Both were only added late in the 2019 model year, but for 2020 will be much more readily available to buyers. The Sierra Denali now has a 10-speed automatic, up from an 8-speed last year. In terms of technology, the 2020 Sierra 1500 can now be equipped with far more cameras.