2026 GMC Sierra Specs: MPG, Gas Mileage, Engine Size & Dimensions
2023–2026 model years274 variantsUp to 68 MPG combined
2026 GMC Sierra Specs at a Glance
The 2026 GMC Sierra gets 68 mpg combined on the 4-Wheel Drive configuration, is EPA-rated for 410 miles of range, tows up to 13,200 lbs, weighs 8,640 lbs, measures 266.1 in long. Figures are per configuration, not a single official number — other trims rate as low as 15 mpg combined. Every figure below comes from EPA, NHTSA, or manufacturer published data — no estimates.
- Combined MPG
- 68 mpg (75 city / 61 hwy)
- Best configuration: 4-Wheel Drive · Automatic (A1) · other 2026 trims rate 15–68 mpg combined
- EPA range
- 410 miles
- Max towing
- 13,200 lbs
- Maximum when properly equipped
- Curb weight
- 8,640 lbs
- Heaviest recorded configuration: SIERRA EV 4DR PICKUP
- Length
- 266.1 in · 83.9 in wide · 80.7 in tall
- Wheelbase
- 172 in
- Fuel tank
- 24 gal
2026 GMC Sierra trims and MPG
| Trim | Engine | Trans | Drive | City | Hwy | Combined |
|---|---|---|---|---|---|---|
| Auto (A1) | — | Automatic (A1) | 4-Wheel Drive | 69 | 59 | 64 |
| Auto (A1) | — | Automatic (A1) | 4-Wheel Drive | 74 | 60 | 67 |
| Auto (A1) | — | Automatic (A1) | 4-Wheel Drive | 75 | 61 | 68 |
| Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 21 | 24 | 23 |
| Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 19 | 20 | 19 |
| Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 22 | 26 | 24 |
| Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | Rear-Wheel Drive | 23 | 28 | 25 |
| Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 17 |
| Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 17 |
| Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 21 | 18 |
| Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 20 | 17 |
| Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 14 | 16 | 15 |
| Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 15 | 18 | 16 |
| Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 14 | 17 | 16 |
| Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 18 | 16 |
| Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 14 | 17 | 15 |
| Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 14 | 16 | 15 |
| Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 16 |
| Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 16 | 17 | 17 |
| Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 17 | 20 | 18 |
| Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 17 | 18 | 17 |
| Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | Rear-Wheel Drive | 17 | 21 | 19 |
| Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | Rear-Wheel Drive | 18 | 21 | 20 |
Detailed Specifications
MPG & Fuel Economy
MPG for every year and trim
View details →Engine Specifications
Engine Specs for every year and trim
View details →Annual Fuel Cost
Fuel Cost for every year and trim
View details →Transmission Specifications
Transmission for every year and trim
View details →Drivetrain & Drive Type
Drivetrain for every year and trim
View details →Vehicle Class & EPA Size Category
Vehicle Class for every year and trim
View details →Maintenance Schedule & Service Intervals
Maintenance for every year and trim
View details →Towing Capacity
Towing for every year and trim
View details →Truck Bed Dimensions
Bed Size for every year and trim
View details →Fuel Tank Capacity
Gas Tank for every year and trim
View details →Dimensions & Size
Dimensions for every year and trim
View details →Curb Weight
Curb Weight for every year and trim
View details →Electric Range & Charging Time
EV Range for every year and trim
View details →GMC Sierra — All Years Overview
| Year | Trim | Engine | Trans | Drive | City | Hwy | Combined | Fuel |
|---|---|---|---|---|---|---|---|---|
| 2026 | Auto (A1) | — | Automatic (A1) | 4-Wheel Drive | 69 | 59 | 64 | Electricity |
| 2026 | Auto (A1) | — | Automatic (A1) | 4-Wheel Drive | 74 | 60 | 67 | Electricity |
| 2026 | Auto (A1) | — | Automatic (A1) | 4-Wheel Drive | 75 | 61 | 68 | Electricity |
| 2026 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 21 | 24 | 23 | Diesel |
| 2026 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 19 | 20 | 19 | Diesel |
| 2026 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 22 | 26 | 24 | Diesel |
| 2026 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | Rear-Wheel Drive | 23 | 28 | 25 | Diesel |
| 2026 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 17 | Regular Gasoline |
| 2026 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 17 | Regular Gasoline |
| 2026 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 21 | 18 | Regular Gasoline |
| 2026 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 20 | 17 | Regular Gasoline |
| 2026 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 14 | 16 | 15 | Regular Gasoline |
| 2026 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 15 | 18 | 16 | Regular Gasoline |
| 2026 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 14 | 17 | 16 | Regular Gasoline |
| 2026 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 18 | 16 | Regular Gasoline |
| 2026 | Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 14 | 17 | 15 | Premium Gasoline |
| 2026 | Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 14 | 16 | 15 | Premium Gasoline |
| 2026 | Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 16 | Premium Gasoline |
| 2026 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 16 | 17 | 17 | Regular Gasoline |
| 2026 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 17 | 20 | 18 | Regular Gasoline |
| 2026 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 17 | 18 | 17 | Regular Gasoline |
| 2026 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | Rear-Wheel Drive | 17 | 21 | 19 | Regular Gasoline |
| 2026 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | Rear-Wheel Drive | 18 | 21 | 20 | Regular Gasoline |
| 2025 | Auto (A1) | — | Automatic (A1) | 4-Wheel Drive | 70 | 59 | 64 | Electricity |
| 2025 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 21 | 24 | 23 | Diesel |
| 2025 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | Rear-Wheel Drive | 23 | 29 | 26 | Diesel |
| 2025 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 22 | 26 | 24 | Diesel |
| 2025 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 19 | 20 | 19 | Diesel |
| 2025 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 14 | 16 | 15 | Regular Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 16 | Regular Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 17 | Regular Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 18 | 16 | Regular Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 17 | Regular Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 18 | 16 | Regular Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 15 | 18 | 16 | Regular Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 21 | 18 | Regular Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 20 | 17 | Regular Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 17 | Regular Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 14 | 17 | 15 | Premium Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 14 | 16 | 15 | Premium Gasoline |
| 2025 | Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 16 | Premium Gasoline |
| 2025 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 17 | 19 | 18 | Regular Gasoline |
| 2025 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | Rear-Wheel Drive | 17 | 21 | 19 | Regular Gasoline |
| 2025 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 16 | 17 | 16 | Regular Gasoline |
| 2025 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | Rear-Wheel Drive | 18 | 21 | 19 | Regular Gasoline |
| 2025 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 17 | 18 | 17 | Regular Gasoline |
| 2024 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | Rear-Wheel Drive | 23 | 29 | 25 | Diesel |
| 2024 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 23 | 27 | 24 | Diesel |
| 2024 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 19 | 20 | 19 | Diesel |
| 2024 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 21 | 23 | 22 | Diesel |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 17 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 20 | 18 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 14 | 17 | 15 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 14 | 17 | 15 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 16 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 20 | 18 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 15 | 19 | 16 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 21 | 18 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 17 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 18 | 16 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 20 | 17 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 18 | 16 | Regular Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 14 | 17 | 15 | Premium Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 14 | 16 | 15 | Premium Gasoline |
| 2024 | Auto 10-spd, 8 cyl, 6.2 L | 8 · 6.2L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 16 | Premium Gasoline |
| 2024 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | Rear-Wheel Drive | 17 | 21 | 19 | Regular Gasoline |
| 2024 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 16 | 17 | 16 | Regular Gasoline |
| 2024 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 17 | 20 | 18 | Regular Gasoline |
| 2024 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | 4-Wheel Drive | 17 | 18 | 17 | Regular Gasoline |
| 2024 | Auto 8-spd, 4 cyl, 2.7 L | 4 · 2.7L | Automatic 8-spd | Rear-Wheel Drive | 18 | 22 | 20 | Regular Gasoline |
| 2023 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 21 | 23 | 22 | Diesel |
| 2023 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | 4-Wheel Drive | 22 | 27 | 24 | Diesel |
| 2023 | Auto 10-spd, 6 cyl, 3.0 L | 6 · 3.0L | Automatic 10-spd | Rear-Wheel Drive | 24 | 29 | 26 | Diesel |
| 2023 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 19 | 17 | Regular Gasoline |
| 2023 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | 4-Wheel Drive | 15 | 17 | 16 | Regular Gasoline |
| 2023 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 15 | 18 | 16 | Regular Gasoline |
| 2023 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 20 | 18 | Regular Gasoline |
| 2023 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 21 | 18 | Regular Gasoline |
| 2023 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 20 | 18 | Regular Gasoline |
| 2023 | Auto 10-spd, 8 cyl, 5.3 L | 8 · 5.3L | Automatic 10-spd | Rear-Wheel Drive | 16 | 21 | 18 | Regular Gasoline |
Showing the 80 most recent EPA configurations of 274 on record. See the full GMC Sierra MPG history.
Compare the GMC Sierra with rivals
Compare across every brand
All GMC Sierra specifications
More GMC models
View all GMC models →GMC Sierra — Frequently Asked Questions
What is the fuel economy of the 2026 GMC Sierra?
The GMC Sierra is EPA-rated at up to 68 MPGe combined (75 city / 61 highway).
What is the towing capacity of the 2026 GMC Sierra?
When properly equipped, the GMC Sierra tows up to 13,200 lbs (6.2L V8 with Max Trailering Package).
What engine does the 2026 GMC Sierra have?
The GMC Sierra is fully electric — it uses an electric motor with a single-speed transmission instead of a combustion engine.
How far can the 2026 GMC Sierra go on a full charge?
The GMC Sierra has an EPA-rated electric driving range of up to 410 miles.
What years of the GMC Sierra are covered here?
This page documents 80 verified GMC Sierra configurations across model years 2023–2026.
Which model year of the GMC Sierra is the most fuel efficient?
The 2026 GMC Sierra holds the highest combined rating at 68 MPG; the 2024 sits lowest at 25 MPG, a difference of 43 MPG (about 172%) across the 4 rated years on file.
How many engine options does the GMC Sierra have?
The records list 4 distinct displacements for the GMC Sierra — 2.7L, 3L, 5.3L, 6.2L — which is why combined MPG varies between trims of the same year.
Is the 2026 GMC Sierra front-wheel drive or all-wheel drive?
The GMC Sierra appears in 2 drivetrain layouts across the years documented here — 4-Wheel Drive, Rear-Wheel Drive — with the latest 2026 record on 4-Wheel Drive.