The 2027 Chevrolet Silverado 1500 and GMC Sierra 1500 Get Worse Fuel Economy Numbers

The EPA has actually launched rankings for the 5.7-liter V-8, 6.6-liter V-8, and 3.0-liter turbodiesel offered in both trucks; last fuel economy figures for the base 2.7-liter turbo-four are still pending. According to information from GM Authorityalmost every noted powertrain and trim mix returns lower scores for 2027. The exception is the GMC Sierra AT4X geared up with the turbodiesel.

The V-8 modifications assist discuss a few of the decrease. The 5.3-liter V-8 has actually been changed by a 5.7-liter engine, while the 6.2-liter V-8 paves the way to a 6.6-liter V-8. Both engines have bigger displacements and more horse power and torque, which in many cases can likewise suggest more fuel intake. The diesel is a more unexpected case: It keeps the exact same 3.0-liter displacement, yet some 2027 setups are ranked as much as 3 mpg lower than their 2026 equivalents.

The tables listed below compare city, highway, and integrated EPA rankings for the 2027 Silverado and Sierra with the previous 2026 designs. The quantity of the modification differs by engine, drivetrain, and trim. In a number of setups, the distinction is just 1 or 2 mpg, while specific four-wheel-drive diesel variations have bigger drops. Selecting a various drivetrain or cut can for that reason impact the contrast as much as the engine itself.

The Sierra AT4X with the 3.0-liter turbodiesel sticks out as the only setup with enhanced scores. It acquires 1 mpg in city driving and 2 mpg on both the highway and combined cycle. For the staying setups, the 2027 rankings are normally even worse throughout city, highway, and combined driving. The last figures for the 2.7-liter turbo-four will finish the contrast once the EPA releases them.