The 2026 GMC Sierra 1500 delivers an EPA-certified 15–25 MPG combined across 14 configurations. Estimated annual fuel costs range from $3,100 to $5,050.
Laboratory certification test values across engine, transmission, and drivetrain permutations
| Configuration / Model | Powertrain | Drivetrain | Transmission | City | Highway | Combined | Annual Fuel Cost | CO2 (g/mi) |
|---|---|---|---|---|---|---|---|---|
| Sierra 2WD Diesel | 3L Turbo-Diesel | Rear-Wheel Drive | Automatic 10-spd | 23 MPG | 28 MPG | 25 MPG | $3,200 | — |
| Sierra 4WD with Sport Mode Diesel | 3L Turbo-Diesel | 4-Wheel Drive | Automatic 10-spd | 22 MPG | 26 MPG | 24 MPG | $3,300 | — |
| Sierra 2WD Regular | 2.7L 4-Cyl Gas | Rear-Wheel Drive | Automatic 8-spd | 18 MPG | 21 MPG | 20 MPG | $3,100 | — |
| Sierra 2WD with Sport Mode Regular | 2.7L 4-Cyl Gas | Rear-Wheel Drive | Automatic 8-spd | 17 MPG | 21 MPG | 19 MPG | $3,250 | — |
| Sierra 4WD AT4X with Sport Mode Diesel | 3L Turbo-Diesel | 4-Wheel Drive | Automatic 10-spd | 19 MPG | 20 MPG | 19 MPG | $4,200 | — |
| Sierra 2WD with Sport Mode Regular | 5.3L 8-Cyl Gas | Rear-Wheel Drive | Automatic 10-spd | 16 MPG | 21 MPG | 18 MPG | $3,400 | — |
| Sierra 4WD Regular | 2.7L 4-Cyl Gas | 4-Wheel Drive | Automatic 8-spd | 17 MPG | 20 MPG | 18 MPG | $3,400 | — |
| Sierra 2WD Regular | 5.3L 8-Cyl Gas | Rear-Wheel Drive | Automatic 10-spd | 16 MPG | 20 MPG | 17 MPG | $3,600 | — |
| Sierra 4WD with Sport Mode Regular | 2.7L 4-Cyl Gas | 4-Wheel Drive | Automatic 8-spd | 17 MPG | 18 MPG | 17 MPG | $3,600 | — |
| Sierra 4WD FFV Gasoline or E85 | 5.3L 8-Cyl Gas | 4-Wheel Drive | Automatic 10-spd | 15 MPG | 19 MPG | 17 MPG | $3,600 | — |
| Sierra 4WD with Sport Mode Regular | 5.3L 8-Cyl Gas | 4-Wheel Drive | Automatic 10-spd | 15 MPG | 19 MPG | 17 MPG | $3,600 | — |
| Sierra 4WD Premium | 6.2L 8-Cyl Gas | 4-Wheel Drive | Automatic 10-spd | 15 MPG | 19 MPG | 16 MPG | $4,750 | — |
| Sierra 4WD Regular | 5.3L 8-Cyl Gas | 4-Wheel Drive | Automatic 10-spd | 15 MPG | 18 MPG | 16 MPG | $3,850 | — |
| Sierra 4WD AT4X Premium | 6.2L 8-Cyl Gas | 4-Wheel Drive | Automatic 10-spd | 14 MPG | 16 MPG | 15 MPG | $5,050 | — |
Standardized annual energy consumption and operating cost metrics based on 15,000 annual miles
Based on $3.50 per gallon regular gasoline
Estimated annual energy units needed for 15,000 miles
Compared to the average new vehicle over 5 years
Cross-reference safety ratings, owner defect complaints, and recall campaigns
Vehicle summary, specifications, and primary KPI metrics.
NHTSA 5-Star NCAP crash tests, rollover risk, and active driver assistance.
NHTSA consumer defect complaint filings by affected component.
Official safety recall notices, defects, and free repair instructions.
Direct, deterministic answers synthesized from verified United States government databases for the 2026 GMC Sierra 1500
The 2026 GMC Sierra 1500 achieves an EPA-certified rating of 15 to 25 MPG combined across 14 certified configuration(s).
City ratings range from 14 to 23 MPG, and highway ratings range from 16 to 28 MPG.
Using AutoUtility's standardized operating cost model, estimated annual fueling and energy costs range between $3,100 and $5,050 for the 2026 GMC Sierra 1500.
Calculated under AutoUtility's standardized methodology (15,000 miles per year, 55% city / 45% highway driving, $3.50/gallon regular gasoline, $0.16/kWh electricity) using official EPA dynamometer consumption ratings.
Fuel economy ratings, electric range figures, and energy cost estimates on this page are retrieved directly from the United States Environmental Protection Agency (EPA) and U.S. Department of Energy (FuelEconomy.gov) certified vehicle database under 40 CFR Part 600.
Local Production Store Compiled: August 2026 • Deterministic Audited Dataset • Zero Dynamic External API Runtime Latency.