Which Vehicles Are Tested
Manufacturers do not test every new vehicle offered for sale. They are only required to test one representative vehicle—typically a preproduction prototype—for each combination of loaded vehicle weight class, transmission class, and basic engine.
Some vehicles are exempt from these requirements:
- Large vehicles prior to 2011: Vehicles with a gross vehicle weight rating (GVWR) over 8,500 pounds, such as larger pickup trucks and SUVs
- Large vehicles from 2011 onward:
- Pickup trucks with GVWR over 8,500 pounds and interior bed length of 72 inches or more
- Cargo vans with GVWR over 8,500 pounds
- Passenger vehicles, such as SUVs and passenger vans with GVWR of 10,000 or more
Popular Vehicles Exempt from Federal Fuel Economy Standards
|Avalanche 2500 Series ¾ Ton
|Silverado 2500/3500 Series
|Sierra 2500/3500 Series
* Exempt prior to 2011
Note: These vehicles are given as examples. This is not a comprehensive list. Since regulations and vehicle model weights and configurations can change over time, certain models/configurations may be exempt for some model years and not for others.