GMC Sierra 4WD with Sport Mode
2026–2026 · 2 configurations
The GMC Sierra 4WD with Sport Mode has been tested by the EPA across 2 different configurations spanning model years 2026 through 2026. Over this period, the Sierra 4WD with Sport Mode has achieved a consistent combined fuel economy rating of 17 MPG. Below you will find a comprehensive breakdown of every tested configuration, organized by model year. Click any row to view detailed specifications, emissions data, and annual fuel cost estimates for that specific vehicle.
All Configurations
| Year | Powertrain | Annual Cost | City | Hwy | Comb MPG | Compare |
|---|---|---|---|---|---|---|
| 2026 | 2.7L 4-cyl 4-Wheel Drive Automatic 8-spd • Regular | $3,500 | 17 | 18 | 17MPG | |
| 2026 | 5.3L 8-cyl 4-Wheel Drive Automatic 10-spd • Regular | $3,500 | 15 | 19 | 17MPG |
Historical Efficiency
Safety Rating History
NHTSA typically tests the base platform of a vehicle and does not test every specific trim level. This specific configuration (Sierra 4WD with Sport Mode) has not been independently rated.
Complaint & Incident History
The data below represents all official consumer complaints reported to the National Highway Traffic Safety Administration (NHTSA) for the GMC Sierra 4WD with Sport Mode. Click on any year to drill down and read the unedited, raw problem narratives submitted directly by vehicle owners.