Photo: GMC Sierra by Ethan Llamas, CC BY-SA 4.0, via Wikimedia Commons. It shows the model, not always this exact version.
GMC · model year 2026
2026 GMC Sierra 4WD with Sport Mode
Pickup · 4-Wheel Drive · Diesel · EPA class: Standard Pickup Trucks 4WD
EPA figures · 2026fueleconomy.gov
24MPG combined
22/26MPG city / highway
$4,000fuel a year
428 g CO₂ per mile 3.0 L 6-cyl turbo Automatic 10-spd
This car on fueleconomy.gov, read 2 October 2026. Your own figures depend on how and where you drive.
Where it places
- 11 Diesel cars and trucks by MPG
Ordered by combined MPG #11 of 44 - 420 2026 cars and trucks
Every car of that year, A to Z #420 of 1,172 - 498 Fuel-efficient AWD and 4WD cars
Ordered by combined MPG #498 of 1,362 - 1585 Gas and hybrid cars by fuel cost
Ordered by fuel a year #1585 of 2,158 - 38 GMC cars
Every model year, newest first #38 of 2,900
Against diesel cars and trucks by MPG
Chart average 23 MPGBest 26 MPG
Lowest on the chart $3,700Chart average $4,210
Every figure on record
- Combined MPG
- 24 MPG
- City MPG
- 22 MPG
- Highway MPG
- 26 MPG
- Annual fuel cost
- $4,000
- Tailpipe CO₂
- 428 g per mile
- Model year
- 2026
- Body
- Pickup
- EPA size class
- Standard Pickup Trucks 4WD
- Drive
- 4-Wheel Drive
- Engine
- 3.0 L 6-cyl turbo
- Transmission
- Automatic 10-spd
- Fuel
- Diesel
Efficiency
Running cost
The car
Powertrain
Cars around it
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24 MPG · $4,000 fuel a year 2027 Chevrolet Tahoe 2WD
24 MPG · $4,000 fuel a year
2025 Chevrolet Silverado 4WD
24 MPG · $4,000 fuel a year 2025 GMC Sierra 4WD
24 MPG · $4,000 fuel a year 2026 Chevrolet Silverado (with Sport Mode) 4WD
24 MPG · $4,000 fuel a year
2025 Chevrolet Suburban 2WD
23 MPG · $4,150 fuel a year
2025 GMC Yukon 2WD
23 MPG · $4,150 fuel a yearEvery alternative to the 2026 GMC Sierra 4WD with Sport Mode →