Transmission Type by Car: CVT, Automatic or Manual / GMC / SonomaGMC Sonoma Transmission by year YearTransmission20044-speed automatic20034-speed automatic or 5-speed manual20024-speed automatic or 5-speed manual20014-speed automatic or 5-speed manual20004-speed automatic or 5-speed manual Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).