GM 2.4 Ecotec Engine Problems The GM 2.4L Ecotec engine made its debut in 2006 and remained through 2019 in the Polaris Slingshot. 2.4 Ecotec engines are found in many Chevy, Buick, Saturn, GM, and Pontiac models. The engine offers a respectable 164-182 horsepower given its small NA design. It's also an efficient engine that offers good fuel economy. However, no engine is … [Read more...] about The 4 Most Common GM 2.4L Ecotec Engine Problems