GMC Sierra MPG by Year

By , Gas Mileage Calculators

Here's the official EPA GMC Sierra MPG for every engine and drivetrain from 1989 to 2026.

Best 2026 Sierra
25 MPG
2026 Sierra 2WD (RWD)
Most efficient Sierra ever
26 MPG
2020-2022 Sierra 2WD
Best non-hybrid Sierra
26 MPG
2020-2022 Sierra 2WD, 3.0L 6-cylinder

Sierra MPG by Year and Version

25 configurations

The EPA has rated 783 configurations of the Sierra across gas, hybrid, electric, diesel and natural gas versions. Trucks come in a lot of engine and drivetrain combinations, so pick a year to narrow the list.

EPA ratings for the 2026 GMC Sierra
VersionEngineTransmissionDriveCityHwyCombinedEPA
Sierra 2WDDiesel3.0L 6-cylAuto 10-spdRWD232825View
Sierra 4WD with Sport ModeDiesel3.0L 6-cylAuto 10-spd4WD222624View
Sierra Mud Terrain Tires with Sport ModeDiesel3.0L 6-cylAuto 10-spd4WD212423View
Sierra 2WD2.7L 4-cylAuto 8-spdRWD182120View
Sierra 2WD with Sport Mode2.7L 4-cylAuto 8-spdRWD172119View
Sierra 4WD AT4X with Sport ModeDiesel3.0L 6-cylAuto 10-spd4WD192019View
Sierra 2WD with Sport Mode5.3L 8-cylAuto 10-spdRWD162118View
Sierra 4WD2.7L 4-cylAuto 8-spd4WD172018View
Sierra 2WD5.3L 8-cylAuto 10-spdRWD162017View
Sierra Mud Terrain Tires 4WD2.7L 4-cylAuto 8-spd4WD161717View
Sierra 4WD with Sport Mode2.7L 4-cylAuto 8-spd4WD171817View
Sierra 4WD FFV5.3L 8-cylAuto 10-spd4WD151917View
Sierra Mud Terrain Tires 4WD FFV5.3L 8-cylAuto 10-spd4WD151917View
Sierra 4WD with Sport Mode5.3L 8-cylAuto 10-spd4WD151917View
Sierra 4WDPremium Gasoline6.2L 8-cylAuto 10-spd4WD151916View
Sierra Mud Terrain Tires 4WD (Sport Mode)5.3L 8-cylAuto 10-spd4WD151816View
Sierra 4WD5.3L 8-cylAuto 10-spd4WD151816View
Sierra Mud Terrain Tires 4WD5.3L 8-cylAuto 10-spd4WD141716View
Sierra Cab Chassis 2WD5.3L 8-cylAuto 10-spdRWD151816View
Sierra Mud Terrain Tires 4WDPremium Gasoline6.2L 8-cylAuto 10-spd4WD141715View
Sierra 4WD AT4XPremium Gasoline6.2L 8-cylAuto 10-spd4WD141615View
Sierra Cab Chassis 4WD5.3L 8-cylAuto 10-spd4WD141615View
SIERRA EV Ext Range (11kW Charger)Electric, MPGeElectric, 410 mi rangeAuto (1-speed)4WD756168View
SIERRA EV Std Range (11kW Charger)Electric, MPGeElectric, 283 mi rangeAuto (1-speed)4WD746067View
SIERRA EV Ext Range (19kW Charger)Electric, MPGeElectric, 385 mi rangeAuto (1-speed)4WD695964View

Electric and hydrogen versions are rated in MPGe, so compare them with each other rather than with the MPG figures.

Sierra MPG Over the Years

Each bar shows the range of combined MPG across every Sierra configuration the EPA rated that year, from the thirstiest version to the most efficient. Hover or tap a year to see the numbers. Electric versions are rated in MPGe, so they're left out of the chart and listed in the table instead.

GMC Sierra combined MPG range by model year
Gas engines onlyRange includes a hybrid

Years When Sierra Fuel Economy Changed

Most years look a lot like the one before. These are the years where the EPA numbers moved in a way that matters if you're shopping for a used Sierra.

How the Sierra Compares

The EPA rated 12 full-size pickups for 2026. The best Sierra version, at 25 MPG combined, ties for 1st with 1 other model of 12. Combined ratings in the class run from 19 to 25 MPG, with a median of 22. Plug-in hybrids and electric models are ranked separately.

Best combined rating for each full-size pickup the EPA rated for 2026, top 5
RankModelCombined
1Chevrolet Silverado25 MPG
1GMC Sierra25 MPG
3Ford F15024 MPG
4Ford Ranger23 MPG
4Toyota Tacoma23 MPG

What Does a Sierra Cost to Fuel or Charge?

Pick a Sierra, then enter your gas price (or electricity rate for an electric version) and how much you drive. The math uses the EPA city and highway ratings, weighted by how much of your driving happens in each.

Yearly cost
Enter a price
Per month-
Gallons per year-
Cost per mile-
Your blended MPG-
Real-world results vary with driving style, weather, tire condition and maintenance.

Sierra MPG Questions

Which Sierra year gets the best gas mileage?

The 2020 to 2022 Sierra 2WD holds the top EPA rating at 26 MPG combined (23 city, 30 highway). Among 2026 models, the Sierra 2WD is rated at 25 MPG combined.

What's the best gas mileage from a non-hybrid Sierra?

The 2020 to 2022 Sierra 2WD with the 3.0L 6-cylinder diesel and rear-wheel drive is rated at 26 MPG combined (23 city, 30 highway).

Is there still a gas-only Sierra?

Yes. The 2026 Sierra lineup includes 18 gas-only versions, rated 15 to 20 MPG combined.

Does four-wheel drive hurt Sierra fuel economy?

A little. On the 2026 Sierra, the best rear-wheel drive version is rated at 20 MPG combined and the best four-wheel drive version at 18 MPG.

How efficient is the electric Sierra?

The most efficient 2026 SIERRA EV Ext Range (11kW Charger) is rated at 68 MPGe combined, which works out to 49.5 kWh per 100 miles. Its EPA range is 410 miles. Range across 2026 versions runs from 283 to 410 miles.

Why doesn't my Sierra match the EPA numbers?

EPA tests assume about 300 pounds of passengers and cargo, flat roads and no trailer, and four-wheel-drive trucks are tested in two-wheel drive. Towing, hauling, hills, idling, speed, cold weather and tire pressure all pull real-world numbers down. Use the ratings to compare one truck with another, and track your own with the MPG calculator.

Keep Going

Compare two vehiclesSee the yearly fuel cost gap between a Sierra and another vehicle. Price a road tripWork out the fuel cost for a trip in your Sierra on our sister site, FuelPriceCalculator.com. All GMC modelsRatings for the Yukon, Canyon, Terrain, Acadia and every other GMC. GMC Canyon MPGAnother GMC, rated 16 to 20 MPG combined for 2026. GMC Yukon MPGAnother GMC, rated 16 to 23 MPG combined for 2026. Ford F150 MPGA full-size pickup from Ford, rated 12 to 24 MPG combined for 2026. Nissan Frontier MPGA full-size pickup from Nissan, rated 18 to 21 MPG combined for 2026. Chevrolet Silverado MPGA full-size pickup from Chevrolet, rated 15 to 25 MPG combined for 2026. GMC Terrain MPGAnother GMC, rated 25 to 27 MPG combined for 2026.

Where These Numbers Come From

Every figure on this page comes from the U.S. EPA fuel economy dataset on fueleconomy.gov, pulled together by Cedrick Reese. The file lists 783 ratings for the GMC Sierra from 1989 to 2026. Each row in the table links to the matching EPA vehicle record, so you can check any figure against the source. Ratings from before 2008 use the EPA's revised estimates, which put older vehicles on the same scale as newer ones. Electric versions are rated in MPGe, the EPA's miles-per-gallon equivalent, and the table also shows their official range. When the EPA posts an updated file with new model years or corrected ratings, this page is rebuilt from it. The cost calculator uses the gas or electricity price you enter rather than a national average, so the result fits where you live.

Ratings on this page come from the EPA file downloaded on October 1, 2026.

Sources