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 20 EPA-tested versions.
EPA fuel economy
2026 GMC Sierra 1500 · 20 EPA-tested versionsBest gas version
20MPG combined
18 city 21 highway
$3,250 a year to fuel15,000 miles a year at EPA's $4.32 a gallon (regular gas)
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 $6.29 a gallon (diesel)
3.0L turbo 6-cyl diesel · RWD · 10-speed automatic
Best version costs $7,250 more in fuel over 5 years vs the average new vehicle (EPA)
At EPA's price assumptions, fuel costs $3,250 to $5,300 a year. Compared with 2025, the best gas version is up 1 mpg and the best diesel version is down 1 mpg.
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 | $3,250 |
2.7L turbo 4-cyl · RWD · 8-speed automatic · with Sport Mode
EPA listing: Sierra 2WD with Sport Mode |
19 mpg | 17 / 21 | $3,400 |
2.7L turbo 4-cyl · 4WD · 8-speed automatic
EPA listing: Sierra 4WD |
18 mpg | 17 / 20 | $3,600 |
5.3L 8-cyl · RWD · 10-speed automatic · with Sport Mode
EPA listing: Sierra 2WD with Sport Mode |
18 mpg | 16 / 21 | $3,600 |
2.7L turbo 4-cyl · 4WD · 8-speed automatic · Mud Terrain Tires
EPA listing: Sierra Mud Terrain Tires 4WD |
17 mpg | 16 / 17 | $3,800 |
2.7L turbo 4-cyl · 4WD · 8-speed automatic · with Sport Mode
EPA listing: Sierra 4WD with Sport Mode |
17 mpg | 17 / 18 | $3,800 |
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 | $3,800 |
5.3L 8-cyl · 4WD · 10-speed automatic · with Sport Mode
EPA listing: Sierra 4WD with Sport Mode |
17 mpg | 15 / 19 | $3,800 |
5.3L 8-cyl · RWD · 10-speed automatic
EPA listing: Sierra 2WD |
17 mpg | 16 / 20 | $3,800 |
5.3L 8-cyl · 4WD · 10-speed automatic · Mud Terrain Tires
EPA listing: Sierra Mud Terrain Tires 4WD |
16 mpg | 14 / 17 | $4,050 |
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 | $4,050 |
5.3L 8-cyl · RWD · 10-speed automatic · Cab Chassis
EPA listing: Sierra Cab Chassis 2WD |
16 mpg | 15 / 18 | $4,050 |
6.2L 8-cyl · 4WD · 10-speed automatic
EPA listing: Sierra 4WD · Premium fuel |
16 mpg | 15 / 19 | $5,000 |
5.3L 8-cyl · 4WD · 10-speed automatic · Cab Chassis
EPA listing: Sierra Cab Chassis 4WD |
15 mpg | 14 / 16 | $4,300 |
6.2L 8-cyl · 4WD · 10-speed automatic · AT4X
EPA listing: Sierra 4WD AT4X · Premium fuel |
15 mpg | 14 / 16 | $5,300 |
6.2L 8-cyl · 4WD · 10-speed automatic · Mud Terrain Tires
EPA listing: Sierra Mud Terrain Tires 4WD · Premium fuel |
15 mpg | 14 / 17 | $5,300 |
| 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: $4.32 a gallon for regular gas, $5.32 a gallon for premium gas, and $6.29 a gallon for diesel. Change the numbers to match your driving.
| Version | Per year | 5 years |
|---|---|---|
2.7L turbo 4-cyl · RWD · 8-speed automatic | $3,240 | $16,200 |
2.7L turbo 4-cyl · RWD · 8-speed automatic · with Sport Mode | $3,411 | $17,053 |
2.7L turbo 4-cyl · 4WD · 8-speed automatic | $3,600 | $18,000 |
5.3L 8-cyl · RWD · 10-speed automatic · with Sport Mode | $3,600 | $18,000 |
2.7L turbo 4-cyl · 4WD · 8-speed automatic · with Sport Mode | $3,812 | $19,059 |
2.7L turbo 4-cyl · 4WD · 8-speed automatic · Mud Terrain Tires | $3,812 | $19,059 |
5.3L 8-cyl · 4WD · 10-speed automatic · no start-stop | $3,812 | $19,059 |
5.3L 8-cyl · 4WD · 10-speed automatic · with Sport Mode | $3,812 | $19,059 |
5.3L 8-cyl · RWD · 10-speed automatic | $3,812 | $19,059 |
5.3L 8-cyl · 4WD · 10-speed automatic · auto start-stop | $4,050 | $20,250 |
5.3L 8-cyl · 4WD · 10-speed automatic · Mud Terrain Tires | $4,050 | $20,250 |
5.3L 8-cyl · RWD · 10-speed automatic · Cab Chassis | $4,050 | $20,250 |
6.2L 8-cyl · 4WD · 10-speed automatic | $4,988 | $24,938 |
5.3L 8-cyl · 4WD · 10-speed automatic · Cab Chassis | $4,320 | $21,600 |
6.2L 8-cyl · 4WD · 10-speed automatic · AT4X | $5,320 | $26,600 |
6.2L 8-cyl · 4WD · 10-speed automatic · Mud Terrain Tires | $5,320 | $26,600 |
3.0L turbo 6-cyl diesel · RWD · 10-speed automatic | $3,774 | $18,870 |
3.0L turbo 6-cyl diesel · 4WD · 10-speed automatic | $3,931 | $19,656 |
3.0L turbo 6-cyl diesel · 4WD · 10-speed automatic · Mud Terrain Tires | $4,102 | $20,511 |
3.0L turbo 6-cyl diesel · 4WD · 10-speed automatic · AT4X | $4,966 | $24,829 |
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: 19 to 21 mpg (every year from 2016 to 2026); highest in 2019. Diesel: 25 to 26 mpg (2020 to 2026); highest in 2020.
- Best gas version
- Best diesel version
2026: gas 20 mpg · diesel 25 mpgTap or drag across the chart for other years.
Show as a table
| Model year | Best gas version | Best diesel version |
|---|---|---|
| 2016 | 20 | – |
| 2017 | 20 | – |
| 2018 | 20 | – |
| 2019 | 21 | – |
| 2020 | 21 | 26 |
| 2021 | 21 | 26 |
| 2022 | 20 | 26 |
| 2023 | 20 | 26 |
| 2024 | 20 | 25 |
| 2025 | 19 | 26 |
| 2026 | 20 | 25 |
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 |
|---|---|---|---|
Best: diesel |
25 mpg | 20 mpg | $3,250 |
GMC Sierra 1500 This page Best: diesel |
25 mpg | 20 mpg | $3,250 |
Best: hybrid |
24 mpg | 21 mpg | $2,700 |
Best: gas |
22 mpg | 22 mpg | $2,950 |
2026 Sierra 1500 recalls and complaints
NHTSA lists 2 safety recalls and 121 owner complaints for the 2026 Sierra 1500.What they cover, and crash test ratingsQuestions
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 Sep 18, 2026.
- EPA fuel price assumptions: regular $4.32, midgrade $4.93, premium $5.32, diesel $6.29 a gallon; electricity $0.15 per kWh.
- Recall and complaint counts: NHTSA recall file dated Sep 27, 2026 and complaint file dated Sep 26, 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.