2026 GMC Sierra Specs, MPG & Trims
EPA fuel-economy data and specifications for the 2026 GMC Sierra (15–68 MPG/MPGe combined) across 25 listed configurations.
Overview
- Body class
- Standard Pickup Trucks 2WD, Standard Pickup Trucks 4WD, Special Purpose Vehicle 2WD, Special Purpose Vehicle 4WD
- Drive
- Rear-Wheel Drive, 4-Wheel Drive
- Engine
- 4-cyl, 2.7 L; 8-cyl, 5.3 L; 6-cyl, 3.0 L; 8-cyl, 6.2 L
- Fuel type
- Regular Gasoline, Diesel, Premium Gasoline, Electricity
- Combined MPG
- 15–68 MPG/MPGe
- Annual fuel cost
- $1,100–$5,500
- Configurations
- 25
MPG & fuel economy
City, highway and combined values below are EPA estimates. Where a powertrain has several configurations, the table shows the lowest–highest reported value. Electric configurations use MPGe.
| Powertrain | City | Highway | Combined | Annual fuel cost | CO2 | Range |
|---|---|---|---|---|---|---|
| 6-cyl 3.0 L · Diesel · 4-Wheel Drive | 19–22 | 20–26 | 19–24 | $4,000–$5,050 | 428–524 g/mi | — |
| 6-cyl 3.0 L · Diesel · Rear-Wheel Drive | 23 | 28 | 25 | $3,850 | 402 g/mi | — |
| 8-cyl 6.2 L · Premium Gasoline · 4-Wheel Drive | 14–15 | 16–19 | 15–16 | $5,150–$5,500 | 539–601 g/mi | — |
| 4-cyl 2.7 L · Regular Gasoline · 4-Wheel Drive | 16–17 | 17–20 | 17–18 | $3,700–$3,950 | 491–536 g/mi | — |
| 8-cyl 5.3 L · Regular Gasoline · 4-Wheel Drive | 14–15 | 16–19 | 15–17 | $3,950–$4,450 | 522–592 g/mi | — |
| 4-cyl 2.7 L · Regular Gasoline · Rear-Wheel Drive | 17–18 | 21 | 19–20 | $3,350–$3,550 | 464–472 g/mi | — |
| 8-cyl 5.3 L · Regular Gasoline · Rear-Wheel Drive | 15–16 | 18–21 | 16–18 | $3,700–$4,200 | 495–551 g/mi | — |
| Electricity · 4-Wheel Drive | 69–75 | 59–61 | 64–68 | $1,100–$1,200 | 0 g/mi | 410 mi |
Configurations & engine comparison
Each row is one configuration/engine combination reported by the EPA for this model year. Missing EPA values are shown as —.
| Configuration / engine | Drive | Transmission | Cyl. | Displ. (L) | Fuel type | City | Hwy | Comb. | Annual cost |
|---|---|---|---|---|---|---|---|---|---|
| Sierra 2WD | Rear-Wheel Drive | Automatic 10-spd | 8 | 5.3 | Regular Gasoline | 16 | 20 | 17 | $3,950 |
| Sierra 2WD | Rear-Wheel Drive | Automatic 10-spd | 6 | 3.0 | Diesel | 23 | 28 | 25 | $3,850 |
| Sierra 2WD | Rear-Wheel Drive | Automatic 8-spd | 4 | 2.7 | Regular Gasoline | 18 | 21 | 20 | $3,350 |
| Sierra 2WD with Sport Mode | Rear-Wheel Drive | Automatic 10-spd | 8 | 5.3 | Regular Gasoline | 16 | 21 | 18 | $3,700 |
| Sierra 2WD with Sport Mode | Rear-Wheel Drive | Automatic 8-spd | 4 | 2.7 | Regular Gasoline | 17 | 21 | 19 | $3,550 |
| Sierra 4WD | 4-Wheel Drive | Automatic 10-spd | 8 | 6.2 | Premium Gasoline | 15 | 19 | 16 | $5,150 |
| Sierra 4WD | 4-Wheel Drive | Automatic 10-spd | 8 | 5.3 | Regular Gasoline | 15 | 18 | 16 | $4,200 |
| Sierra 4WD | 4-Wheel Drive | Automatic 8-spd | 4 | 2.7 | Regular Gasoline | 17 | 20 | 18 | $3,700 |
| Sierra 4WD AT4X | 4-Wheel Drive | Automatic 10-spd | 8 | 6.2 | Premium Gasoline | 14 | 16 | 15 | $5,500 |
| Sierra 4WD AT4X with Sport Mode | 4-Wheel Drive | Automatic 10-spd | 6 | 3.0 | Diesel | 19 | 20 | 19 | $5,050 |
| Sierra 4WD FFV | 4-Wheel Drive | Automatic 10-spd | 8 | 5.3 | Regular Gasoline | 15 | 19 | 17 | $3,950 |
| Sierra 4WD with Sport Mode | 4-Wheel Drive | Automatic 10-spd | 8 | 5.3 | Regular Gasoline | 15 | 19 | 17 | $3,950 |
| Sierra 4WD with Sport Mode | 4-Wheel Drive | Automatic 10-spd | 6 | 3.0 | Diesel | 22 | 26 | 24 | $4,000 |
| Sierra 4WD with Sport Mode | 4-Wheel Drive | Automatic 8-spd | 4 | 2.7 | Regular Gasoline | 17 | 18 | 17 | $3,950 |
| Sierra Cab Chassis 2WD | Rear-Wheel Drive | Automatic 10-spd | 8 | 5.3 | Regular Gasoline | 15 | 18 | 16 | $4,200 |
| Sierra Cab Chassis 4WD | 4-Wheel Drive | Automatic 10-spd | 8 | 5.3 | Regular Gasoline | 14 | 16 | 15 | $4,450 |
| SIERRA EV Ext Range (11kW Charger) | 4-Wheel Drive | Automatic (A1) | — | — | Electricity | 75 | 61 | 68 | $1,100 |
| SIERRA EV Ext Range (19kW Charger) | 4-Wheel Drive | Automatic (A1) | — | — | Electricity | 69 | 59 | 64 | $1,200 |
| SIERRA EV Std Range (11kW Charger) | 4-Wheel Drive | Automatic (A1) | — | — | Electricity | 74 | 60 | 67 | $1,150 |
| Sierra Mud Terrain Tires 4WD | 4-Wheel Drive | Automatic 10-spd | 8 | 6.2 | Premium Gasoline | 14 | 17 | 15 | $5,500 |
| Sierra Mud Terrain Tires 4WD | 4-Wheel Drive | Automatic 10-spd | 8 | 5.3 | Regular Gasoline | 14 | 17 | 16 | $4,200 |
| Sierra Mud Terrain Tires 4WD | 4-Wheel Drive | Automatic 8-spd | 4 | 2.7 | Regular Gasoline | 16 | 17 | 17 | $3,950 |
| Sierra Mud Terrain Tires 4WD (Sport Mode) | 4-Wheel Drive | Automatic 10-spd | 8 | 5.3 | Regular Gasoline | 15 | 18 | 16 | $4,200 |
| Sierra Mud Terrain Tires 4WD FFV | 4-Wheel Drive | Automatic 10-spd | 8 | 5.3 | Regular Gasoline | 15 | 19 | 17 | $3,950 |
| Sierra Mud Terrain Tires with Sport Mode | 4-Wheel Drive | Automatic 10-spd | 6 | 3.0 | Diesel | 21 | 24 | 23 | $4,150 |
Frequently asked questions
What is the combined MPG of the 2026 GMC Sierra?
According to EPA data, the 2026 GMC Sierra is rated at 15–25 MPG combined for its conventional-fuel configurations, and 64–68 MPGe combined for its electric configurations.
How many cylinders does the 2026 GMC Sierra have?
The EPA data lists 4, 6, and 8 cylinders across its configurations.
What fuel type does the 2026 GMC Sierra use?
It is offered with Regular Gasoline, Diesel, Premium Gasoline, and Electricity.
What is the annual fuel cost of the 2026 GMC Sierra?
The EPA estimates annual fuel costs ranging from $1,100 to $5,500.