Model year (MY) 2021 General Motors cars and light trucks on U.S. roads had a preliminary CO2 emission level of some *** grams per mile, the highest level of all manufacturers. Adjusted CO2 values reflect real world estimates.
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Environmental Protection Agency. (November 30, 2021). Adjusted CO2 emission levels for MY 2021 light-duty vehicles sold in the United States, by manufacturer (in grams per mile) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 03, 2026, from /statistics/659897/co2-emission-levels-light-duty-vehicles-united-states-by-oem/
Environmental Protection Agency. "Adjusted CO2 emission levels for MY 2021 light-duty vehicles sold in the United States, by manufacturer (in grams per mile)." Chart. November 30, 2021. ÌÇÐÄÆƽâ°æ. Accessed August 03, 2026. /statistics/659897/co2-emission-levels-light-duty-vehicles-united-states-by-oem/
Environmental Protection Agency. (2021). Adjusted CO2 emission levels for MY 2021 light-duty vehicles sold in the United States, by manufacturer (in grams per mile). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 03, 2026. /statistics/659897/co2-emission-levels-light-duty-vehicles-united-states-by-oem/
Environmental Protection Agency. "Adjusted Co2 Emission Levels for My 2021 Light-duty Vehicles Sold in The United States, by Manufacturer (in Grams per Mile)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 30 Nov 2021, /statistics/659897/co2-emission-levels-light-duty-vehicles-united-states-by-oem/
Environmental Protection Agency, Adjusted CO2 emission levels for MY 2021 light-duty vehicles sold in the United States, by manufacturer (in grams per mile) ÌÇÐÄÆƽâ°æ, /statistics/659897/co2-emission-levels-light-duty-vehicles-united-states-by-oem/ (last visited August 03, 2026)
Adjusted CO2 emission levels for MY 2021 light-duty vehicles sold in the United States, by manufacturer (in grams per mile) [Graph], Environmental Protection Agency, November 30, 2021. [Online]. Available: /statistics/659897/co2-emission-levels-light-duty-vehicles-united-states-by-oem/
