Sierra 2WD — Diesel · RWD · 3L 6-cyl · 25 MPG
Official vehicle configuration guide
2026 GMC Sierra
Compare 27 EPA-tested configurations, including the exact powertrain, fuel, driven wheels, engine, transmission and efficiency data available for this model year.
Official source verified U.S. market 27 EPA configurations GasolineDieselFlex fuelElectric 6 feature guides
Compare researched years → Official EPA configuration data
27 configurationsChoose the closest tested configuration.
These entries distinguish powertrains and driveline combinations recorded by the U.S. EPA. They help narrow the vehicle, but they are not guaranteed retail trim or option-package names.
Match the fuel type, drive and transmission shown on the vehicle documents. A dealer package may use a different name.
Selected configurationSierra 2WD — Gasoline · RWD · 2.7L 4-cyl · 20 MPG
Gasoline- Fuel
- Regular
- Engine
- SIDI · turbocharged
- Drive
- RWD
- Transmission
- Automatic 8-spd
- EPA combined
- 20 MPG combined
- City / highway
- 18 / 21 MPG
- Electric motor
- Not listed
- Range
- Not listed
- 240 V charge time
- Not listed
- Secondary / blended economy
- Not listed
- EPA vehicle class
- Standard Pickup Trucks 2WD
- Stop-start system
- Yes
Sierra 2WD — Gasoline · RWD · 2.7L 4-cyl · 20 MPG selected.
Configuration is not the same as trim. EPA records can separate engines, fuel systems, transmissions or driven wheels without identifying badges such as LX, XLE or Touring. Confirm the retail trim with the window sticker, build sheet or manufacturer VIN portal.
Compare every tested configuration
27 official recordsMechanical and efficiency differences.
All rows are visible in the page and link to their exact government record. EPA configurations identify tested hardware, not guaranteed retail trim names.
SIERRA EV Ext Range (11kW Charger) — Electric · 4WD · 68 MPGe
SIERRA EV Ext Range (11kW Charger) — Electric · 4WD · 68 MPGe
View all 27 EPA configuration rows
| EPA carline | Powertrain | Engine / motor | Drive | Transmission | Combined | Range / charge | Source |
|---|---|---|---|---|---|---|---|
| Sierra 2WD — Gasoline · RWD · 2.7L 4-cyl · 20 MPG | GasolineRegular | SIDI | RWD | Automatic 8-spd | 20 MPG18 city / 21 highway | — | EPA record ↗ |
| Sierra 2WD — Gasoline · RWD · 5.3L 8-cyl · 17 MPG | GasolineRegular | SIDI | RWD | Automatic 10-spd | 17 MPG16 city / 20 highway | — | EPA record ↗ |
| Sierra 2WD — Diesel · RWD · 3L 6-cyl · 25 MPG | DieselDiesel | 3 L · 6-cyl | RWD | Automatic 10-spd | 25 MPG23 city / 28 highway | — | EPA record ↗ |
| Sierra 2WD with Sport Mode — Gasoline · RWD · 2.7L 4-cyl · 19 MPG | GasolineRegular | SIDI | RWD | Automatic 8-spd | 19 MPG17 city / 21 highway | — | EPA record ↗ |
| Sierra 2WD with Sport Mode — Gasoline · RWD · 5.3L 8-cyl · 18 MPG | GasolineRegular | SIDI | RWD | Automatic 10-spd | 18 MPG16 city / 21 highway | — | EPA record ↗ |
| Sierra 4WD — Gasoline · 4WD · 2.7L 4-cyl · 18 MPG | GasolineRegular | SIDI | 4WD | Automatic 8-spd | 18 MPG17 city / 20 highway | — | EPA record ↗ |
| Sierra 4WD — Gasoline · 4WD · 6.2L 8-cyl · 16 MPG | GasolinePremium | SIDI | 4WD | Automatic 10-spd | 16 MPG15 city / 19 highway | — | EPA record ↗ |
| Sierra 4WD — Gasoline · 4WD · 5.3L 8-cyl · 16 MPG | GasolineRegular | SIDI | 4WD | Automatic 10-spd | 16 MPG15 city / 18 highway | — | EPA record ↗ |
| Sierra 4WD (Municipal) — Gasoline · 4WD · 5.3L 8-cyl · 16 MPG | GasolineRegular | SIDI | 4WD | Automatic 10-spd | 16 MPG15 city / 19 highway | — | EPA record ↗ |
| Sierra 4WD AT4X — Gasoline · 4WD · 6.2L 8-cyl · 15 MPG | GasolinePremium | SIDI | 4WD | Automatic 10-spd | 15 MPG14 city / 16 highway | — | EPA record ↗ |
| Sierra 4WD AT4X with Sport Mode — Diesel · 4WD · 3L 6-cyl · 19 MPG | DieselDiesel | 3 L · 6-cyl | 4WD | Automatic 10-spd | 19 MPG19 city / 20 highway | — | EPA record ↗ |
| Sierra 4WD FFV — Flex fuel · 4WD · 5.3L 8-cyl · 17 MPG | Flex fuelGasoline or E85 | SIDI; FFV | 4WD | Automatic 10-spd | 17 MPG15 city / 19 highway | 288 mi EV | EPA record ↗ |
| Sierra 4WD with Sport Mode — Gasoline · 4WD · 2.7L 4-cyl · 17 MPG | GasolineRegular | SIDI | 4WD | Automatic 8-spd | 17 MPG17 city / 18 highway | — | EPA record ↗ |
| Sierra 4WD with Sport Mode — Gasoline · 4WD · 5.3L 8-cyl · 17 MPG | GasolineRegular | SIDI | 4WD | Automatic 10-spd | 17 MPG15 city / 19 highway | — | EPA record ↗ |
| Sierra 4WD with Sport Mode — Diesel · 4WD · 3L 6-cyl · 24 MPG | DieselDiesel | 3 L · 6-cyl | 4WD | Automatic 10-spd | 24 MPG22 city / 26 highway | — | EPA record ↗ |
| Sierra Cab Chassis 2WD — Gasoline · RWD · 5.3L 8-cyl · 16 MPG | GasolineRegular | SIDI | RWD | Automatic 10-spd | 16 MPG15 city / 18 highway | — | EPA record ↗ |
| Sierra Cab Chassis 4WD — Gasoline · 4WD · 5.3L 8-cyl · 15 MPG | GasolineRegular | SIDI | 4WD | Automatic 10-spd | 15 MPG14 city / 16 highway | — | EPA record ↗ |
| SIERRA EV Ext Range (11kW Charger) — Electric · 4WD · 68 MPGe | ElectricElectricity | 255 and 256 kW ACPM | 4WD | Automatic (A1) | 68 MPGe75 city / 61 highway | 410 mi18.6 h at 240 V | EPA record ↗ |
| SIERRA EV Ext Range (19kW Charger) — Electric · 4WD · 64 MPGe | ElectricElectricity | 255 and 256 kW ACPM | 4WD | Automatic (A1) | 64 MPGe69 city / 59 highway | 385 mi11.5 h at 240 V | EPA record ↗ |
| SIERRA EV Std Range (11kW Charger) — Electric · 4WD · 67 MPGe | ElectricElectricity | 255 and 256 kW ACPM | 4WD | Automatic (A1) | 67 MPGe74 city / 60 highway | 283 mi13.3 h at 240 V | EPA record ↗ |
| Sierra Mud Terrain Tires 4WD — Gasoline · 4WD · 2.7L 4-cyl · 17 MPG | GasolineRegular | SIDI | 4WD | Automatic 8-spd | 17 MPG16 city / 17 highway | — | EPA record ↗ |
| Sierra Mud Terrain Tires 4WD — Gasoline · 4WD · 6.2L 8-cyl · 15 MPG | GasolinePremium | SIDI | 4WD | Automatic 10-spd | 15 MPG14 city / 17 highway | — | EPA record ↗ |
| Sierra Mud Terrain Tires 4WD — Gasoline · 4WD · 5.3L 8-cyl · 16 MPG | GasolineRegular | SIDI | 4WD | Automatic 10-spd | 16 MPG14 city / 17 highway | — | EPA record ↗ |
| Sierra Mud Terrain Tires 4WD (Municipal) — Gasoline · 4WD · 5.3L 8-cyl · 16 MPG | GasolineRegular | SIDI | 4WD | Automatic 10-spd | 16 MPG15 city / 19 highway | — | EPA record ↗ |
| Sierra Mud Terrain Tires 4WD (Sport Mode) — Gasoline · 4WD · 5.3L 8-cyl · 16 MPG | GasolineRegular | SIDI | 4WD | Automatic 10-spd | 16 MPG15 city / 18 highway | — | EPA record ↗ |
| Sierra Mud Terrain Tires 4WD FFV — Flex fuel · 4WD · 5.3L 8-cyl · 17 MPG | Flex fuelGasoline or E85 | SIDI; FFV | 4WD | Automatic 10-spd | 17 MPG15 city / 19 highway | 288 mi EV | EPA record ↗ |
| Sierra Mud Terrain Tires with Sport Mode — Diesel · 4WD · 3L 6-cyl · 23 MPG | DieselDiesel | 3 L · 6-cyl | 4WD | Automatic 10-spd | 23 MPG21 city / 24 highway | — | EPA record ↗ |
At a glance
What the official records cover.
Each option above is tied to a unique FuelEconomy.gov vehicle ID. EPA names sometimes expose a retail badge such as LE or Woodland Edition, but many records identify only the tested mechanical configuration.
Sierra 2WD, Sierra 2WD with Sport Mode, Sierra 4WD, Sierra 4WD (Municipal), Sierra 4WD AT4X, Sierra 4WD AT4X with Sport Mode +12 more
Gasoline, Diesel, Flex fuel, Electric
RWD, 4WD
2.7L 4-cyl, 5.3L 8-cyl, 3L 6-cyl, 6.2L 8-cyl, 255 and 256 kW ACPM
How to identify yours
Match the hardware before the badge.
- 1
Start with fuel and powertrain. Check whether the vehicle is gasoline, diesel, hybrid, plug-in hybrid, electric or fuel-cell.
- 2
Match driven wheels and engine. Use FWD, RWD, AWD or 4WD plus displacement/cylinder information from the window sticker or registration.
- 3
Confirm the exact EPA record. Select the closest option and open its FuelEconomy.gov link. Use a VIN-specific build sheet when you need the retail trim or option package.
Source: U.S. Department of Energy / EPA FuelEconomy.gov dataset ↗ · U.S. market snapshot 2026-11-04. Economy values are official estimates, not a promise of real-world consumption.
Before you try a feature: equipment, trim, powertrain, market and software can change availability. Open the guide and check its exact scope.
Verified discoveries
Features worth knowing.
Written instructions are primary. Videos appear only when we can match a useful clip to the feature and scope.
Retail trims and named packages are separate from equipment requirements. Equipment-only guides remain visible; confirm the final factory build from the window sticker or owner portal.
Car wash mode Official source verified
Keep the 2026 Sierra EV in Neutral for a Conveyor Car Wash
Use the official Car Wash Mode sequence so the electric truck remains in Neutral instead of automatically selecting Park.
Power modes Official source verified
Keep the Sierra EV On for a Timed, Attended Stop
Set Park and the parking brake, then use the infotainment timer before leaving the driver seat briefly.
MultiPro Midgate Official source verified
Lower and Securely Raise the Sierra EV MultiPro Midgate
Fold the rear seats, support the midgate from outside and use short or long switch presses for the desired opening.
Removable rear glass Official source verified
Remove and Secure the Sierra EV Midgate Rear Glass
Turn off the defroster, fold the seats, release both upper latches and lock the glass into the Midgate storage pocket.
One-Pedal Driving Official source verified
Turn On and Adjust One-Pedal Driving in the 2026 Sierra EV
Open Vehicle Controls, choose Drive and Park, enable One-Pedal Driving and select the desired deceleration level.
Regenerative braking Official source verified
Use the Sierra EV Regen on Demand Paddle
Hold the steering-wheel paddle to increase regenerative deceleration and use the accelerator to move again after a full stop.