GMC Sierra 4WD AT4
2020–2021 · 13 configurations
The GMC Sierra 4WD AT4 has been tested by the EPA across 13 different configurations spanning model years 2020 through 2021. Over this period, the Sierra 4WD AT4 has achieved combined fuel economy ratings ranging from 16 MPG to 24 MPG, with an overall average of 18 MPG across all engine, transmission, and drivetrain combinations. 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
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 AT4) 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 AT4. Click on any year to drill down and read the unedited, raw problem narratives submitted directly by vehicle owners.
Fatal Crash History (FARS)
The Fatality Analysis Reporting System (FARS) is a nationwide census providing NHTSA, Congress and the American public yearly data regarding fatal injuries suffered in motor vehicle traffic crashes. The data below represents historical totals for the GMC GMC C, K, R, V-series pickup/ Sierra grouping as reported by the NHTSA.
Total Fatal Crashes140Total Deaths45
Incident Risk Profile
Breakdown of the initial point of impact across all fatal collisions involving this model.