MPG and Fuel Economy on the All-New 2020 GMC Sierra


The new 2020 GMC Sierra is a new contender amongst pick-up trucks, and there's been a lot of curiosity about the fuel economy of the new revamped Sierra. Let's take a look at the fuel economy of the various trims under the 2020 GMC Sierra: 


2020 GMC Sierra

For the GMC Sierra with the 2.7-liter, 4-cylinder engine, an automatic 8-speed transmission, the EPA ratings for the fuel economy measure out at 19 mpg in the city, 22 on the highway, and a combined score of 20.

However, if the engine is replaced with a 5.3-liter, 8-cylinder engine, the power supplied to the car is a lot more, but the fuel savings observe a slight dip. In this model, the EPA ratings come in at 17mpg in the city, 23 on the highway, and a combined 19.

When we make further changes to the engine to replace it with a 4.3-liter 6-cylinder engine with a 6-speed automatic transmission, the EPA numbers recognize a higher dip. The ratings for this variant come in at 16 mpg in the city, 21 on the highway, and 17 on average.

For the variant equipped with a 6-liter, 3-cylinder engine with the automatic 10-speed, the EPA ranks rise, clocking out at 23 in the city, 30 on the highway, and a combined rating of 26.

In the variant equipped with a 2.7 Litre 4 cylinder engine with the 8-speed transmission, the EPA ratings are again quite high for the power supplied. These measure out at 20 in the city, 23 on the highway, and a 21 combined.

However, the fuel economy for all the above variants was measured in the 2-wheel-drive mode. When converted to a 4-wheel-drive, the car is supplied with a tremendous amount of power, which albeit leads to faster consumption of fuel. So, the figures mentioned above will see a slight dip of 1 or 2 points in ratings when converted to the 4-wheel-drive model.

The 2020 GMC Sierra will soon be available in dealerships across the country. For residents of Allentown, Easton, and Bethlehem, the closest dealership is Kelly Buick GMC, located in Emmaus, PA.

Source: GMC