2026 GMC Sierra 1500 MPG and Fuel Cost

The 2026 GMC Sierra 1500 gets up to 20 mpg combined with a gas engine and up to 25 mpg with the diesel, across 21 EPA-tested versions.

EPA fuel economy

2026 GMC Sierra 1500 · 21 EPA-tested versions

Best gas version

20MPG combined

18 city 21 highway

$3,100 a year to fuel15,000 miles a year at EPA's $4.00 a gallon (regular gas)

Fuel economy score4/10

2.7L turbo 4-cyl · RWD · 8-speed automatic

Best diesel version

25MPG combined

23 city 28 highway

$3,750 a year to fuel15,000 miles a year at EPA's $6.13 a gallon (diesel)

Fuel economy score5/10

3.0L turbo 6-cyl diesel · RWD · 10-speed automatic

Best version costs $7,750 more in fuel over 5 years vs the average new vehicle (EPA)

Data: US EPA, fueleconomy.govUpdated Nov 12, 2026

At EPA's price assumptions, fuel costs $3,100 to $5,150 a year. Compared with 2025, the best gas version is up 1 mpg and the best diesel version is down 1 mpg.

Too new to rank against other Sierra 1500 years

The 2026 Sierra 1500 has not had three full years of owner complaints yet.

Years to avoid: 2014 and 2023. Based on owner complaints, not adjusted for sales.

Every Sierra 1500 year ranked The 2026 Sierra 1500's recalls and problems

Every 2026 Sierra 1500 version

EPA's ratings for each version it tested. Fuel cost is EPA's estimate for 15,000 miles a year at its current prices.

Version	Combined	City / Hwy	Fuel / year
Gas
2.7L turbo 4-cyl · RWD · 8-speed automatic EPA listing: Sierra 2WD	20 mpg	18 / 21	$3,100
2.7L turbo 4-cyl · RWD · 8-speed automatic · with Sport Mode EPA listing: Sierra 2WD with Sport Mode	19 mpg	17 / 21	$3,300
2.7L turbo 4-cyl · 4WD · 8-speed automatic EPA listing: Sierra 4WD	18 mpg	17 / 20	$3,450
5.3L 8-cyl · RWD · 10-speed automatic · with Sport Mode EPA listing: Sierra 2WD with Sport Mode	18 mpg	16 / 21	$3,450
2.7L turbo 4-cyl · 4WD · 8-speed automatic · Mud Terrain Tires EPA listing: Sierra Mud Terrain Tires 4WD	17 mpg	16 / 17	$3,650
2.7L turbo 4-cyl · 4WD · 8-speed automatic · with Sport Mode EPA listing: Sierra 4WD with Sport Mode	17 mpg	17 / 18	$3,650
5.3L 8-cyl · 4WD · 10-speed automatic · no start-stop EPA listing: Sierra 4WD FFV (also Sierra Mud Terrain Tires 4WD FFV) · Flex-fuel (E85)	17 mpg	15 / 19	$3,650
5.3L 8-cyl · 4WD · 10-speed automatic · with Sport Mode EPA listing: Sierra 4WD with Sport Mode	17 mpg	15 / 19	$3,650
5.3L 8-cyl · RWD · 10-speed automatic EPA listing: Sierra 2WD	17 mpg	16 / 20	$3,650
5.3L 8-cyl · 4WD · 10-speed automatic · Mud Terrain Tires EPA listing: Sierra Mud Terrain Tires 4WD	16 mpg	14 / 17	$3,900
5.3L 8-cyl · 4WD · 10-speed automatic · Municipal EPA listing: Sierra 4WD (Municipal) (also Sierra Mud Terrain Tires 4WD (Municipal))	16 mpg	15 / 19	$3,900
5.3L 8-cyl · 4WD · 10-speed automatic · auto start-stop EPA listing: Sierra 4WD (also Sierra Mud Terrain Tires 4WD (Sport Mode))	16 mpg	15 / 18	$3,900
5.3L 8-cyl · RWD · 10-speed automatic · Cab Chassis EPA listing: Sierra Cab Chassis 2WD	16 mpg	15 / 18	$3,900
6.2L 8-cyl · 4WD · 10-speed automatic EPA listing: Sierra 4WD · Premium fuel	16 mpg	15 / 19	$4,850
5.3L 8-cyl · 4WD · 10-speed automatic · Cab Chassis EPA listing: Sierra Cab Chassis 4WD	15 mpg	14 / 16	$4,150
6.2L 8-cyl · 4WD · 10-speed automatic · AT4X EPA listing: Sierra 4WD AT4X · Premium fuel	15 mpg	14 / 16	$5,150
6.2L 8-cyl · 4WD · 10-speed automatic · Mud Terrain Tires EPA listing: Sierra Mud Terrain Tires 4WD · Premium fuel	15 mpg	14 / 17	$5,150
Diesel
3.0L turbo 6-cyl diesel · RWD · 10-speed automatic Best EPA listing: Sierra 2WD	25 mpg	23 / 28	$3,750
3.0L turbo 6-cyl diesel · 4WD · 10-speed automatic EPA listing: Sierra 4WD with Sport Mode	24 mpg	22 / 26	$3,950
3.0L turbo 6-cyl diesel · 4WD · 10-speed automatic · Mud Terrain Tires EPA listing: Sierra Mud Terrain Tires with Sport Mode	23 mpg	21 / 24	$4,100
3.0L turbo 6-cyl diesel · 4WD · 10-speed automatic · AT4X EPA listing: Sierra 4WD AT4X with Sport Mode	19 mpg	19 / 20	$4,950

Fuel cost at your prices

EPA's annual cost uses 15,000 miles a year, 55% city driving and its current prices: $4.00 a gallon for regular gas, $5.01 a gallon for premium gas, and $6.13 a gallon for diesel. Change the numbers to match your driving.

Version	Per year	Per month	5 years
2.7L turbo 4-cyl · RWD · 8-speed automatic	$3,000	$250	$15,000
2.7L turbo 4-cyl · RWD · 8-speed automatic · with Sport Mode	$3,158	$263	$15,789
2.7L turbo 4-cyl · 4WD · 8-speed automatic	$3,333	$278	$16,667
5.3L 8-cyl · RWD · 10-speed automatic · with Sport Mode	$3,333	$278	$16,667
2.7L turbo 4-cyl · 4WD · 8-speed automatic · with Sport Mode	$3,529	$294	$17,647
2.7L turbo 4-cyl · 4WD · 8-speed automatic · Mud Terrain Tires	$3,529	$294	$17,647
5.3L 8-cyl · 4WD · 10-speed automatic · no start-stop	$3,529	$294	$17,647
5.3L 8-cyl · 4WD · 10-speed automatic · with Sport Mode	$3,529	$294	$17,647
5.3L 8-cyl · RWD · 10-speed automatic	$3,529	$294	$17,647
5.3L 8-cyl · 4WD · 10-speed automatic · auto start-stop	$3,750	$313	$18,750
5.3L 8-cyl · 4WD · 10-speed automatic · Municipal	$3,750	$313	$18,750
5.3L 8-cyl · 4WD · 10-speed automatic · Mud Terrain Tires	$3,750	$313	$18,750
5.3L 8-cyl · RWD · 10-speed automatic · Cab Chassis	$3,750	$312	$18,750
6.2L 8-cyl · 4WD · 10-speed automatic	$4,697	$391	$23,484
5.3L 8-cyl · 4WD · 10-speed automatic · Cab Chassis	$4,000	$333	$20,000
6.2L 8-cyl · 4WD · 10-speed automatic · AT4X	$5,010	$417	$25,050
6.2L 8-cyl · 4WD · 10-speed automatic · Mud Terrain Tires	$5,010	$417	$25,050
3.0L turbo 6-cyl diesel · RWD · 10-speed automatic	$3,678	$306	$18,390
3.0L turbo 6-cyl diesel · 4WD · 10-speed automatic	$3,831	$319	$19,156
3.0L turbo 6-cyl diesel · 4WD · 10-speed automatic · Mud Terrain Tires	$3,998	$333	$19,989
3.0L turbo 6-cyl diesel · 4WD · 10-speed automatic · AT4X	$4,839	$403	$24,197

At the default settings the results match EPA's annual cost before EPA rounds it to the nearest $50.

GMC Sierra 1500 MPG by model year

The best-rated version in each model year; the highlighted year is this page. Gas: 18 to 21 mpg (every year from 2010 to 2026); highest in 2019. Hybrid: 21 to 22 mpg (2010 to 2013); highest in 2010.

Best gas version
Best hybrid version

2026: gas 20 mpg · hybrid not offered

Show as a table

GMC Sierra 1500 best combined mpg by model year
Model year	Best gas version	Best hybrid version
2010	18	22
2011	18	21
2012	18	21
2013	18	21
2014	20	–
2015	20	–
2016	20	–
2017	20	–
2018	20	–
2019	21	–
2020	21	–
2021	21	–
2022	20	–
2023	20	–
2024	20	–
2025	19	–
2026	20	–

Every Sierra 1500 year's ratings in one table

How the 2026 Sierra 1500 compares

2026 full-size pickups covered on this site, ranked by their best combined rating. Fuel cost is for each model's cheapest version to run, at EPA's prices.

2026 model	Best combined	Best gas	Fuel / year
Chevrolet Silverado 1500 Best: diesel	25 mpg	20 mpg	$3,100
GMC Sierra 1500 This page Best: diesel	25 mpg	20 mpg	$3,100
Ford F-150 Best: hybrid	24 mpg	21 mpg	$2,600
Ram 1500 Best: gas	22 mpg	22 mpg	$2,850
Toyota Tundra Best: hybrid	22 mpg	20 mpg	$2,850

2026 Sierra 1500 recalls and complaints

NHTSA lists 2 safety recalls and 150 owner complaints for the 2026 Sierra 1500.

Owners most often describe engine failure (56 complaints, 37%), then loss of power (29). NHTSA's overall crash rating: 5 stars for the versions it has rated.

See the 2026 Sierra 1500 recalls and problems

Questions

Does 4WD lower the 2026 GMC Sierra 1500's gas mileage?

Yes. On versions that differ only in drive, 4WD lowers the combined rating by 1 to 2 mpg: the 2.7L turbo 4-cyl gets 20 mpg combined with two-wheel drive and 18 with 4WD.

Does the 2026 GMC Sierra 1500 need premium gas?

Some versions do. EPA lists the 6.2L 8-cyl versions on premium, the diesel runs on diesel fuel, and the rest use regular.

How does the 2026 Sierra 1500's MPG compare with the 2025?

For 2026, the best gas version is rated 20 mpg, up 1 from 19 and the best diesel version is rated 25 mpg, down 1 from 26.

Sources and method

US EPA and Department of Energy fuel economy data (fueleconomy.gov), file dated Nov 4, 2026.
EPA fuel price assumptions: regular $4.00, midgrade $4.61, premium $5.01, diesel $6.13 a gallon; electricity $0.15 per kWh.
Recall and complaint counts: NHTSA recall file dated Nov 12, 2026 and complaint file dated Nov 11, 2026.

Ratings are EPA estimates. Real-world mileage depends on how, where and in what weather you drive. How we build these pages. Spotted an error? Tell us.