The Mitchell 1 2022 Emission Control Application Guide is a source for auto repair shops that do smog testing. The guide is for domestic and import cars, light trucks, vans (diesel engines) and Class ‘A’ motor homes with gasoline engines, model years 1966 to 2022. With its vehicle-specific emissions system information, the guide can be used in combination with the online auto repair information in ProDemand to help shops stay in compliance with state emissions standards.