The Chevrolet Cobalt, produced from 2005 to 2010, represents Chevrolet's commitment to providing reliable and accessible compact transportation. Built on the GM Delta II platform, this vehicle offered a range of efficient Ecotec engine options, from the naturally aspirated 2.0L to the potent 2.0L turbocharged LNF found in SS models, delivering horsepower from approximately 135 to 260 HP. Available as a two-door coupe or a four-door sedan, the Cobalt was designed for everyday driving, balancing practicality with comfortable ergonomics and a legacy of Chevrolet's dependable engineering. This comprehensive service and repair manual is your definitive guide to understanding, maintaining, and repairing your 2009 Chevrolet Cobalt. It covers all essential vehicle systems, including detailed procedures for powertrain, drivetrain, chassis, and electrical components. You will find in-depth information on scheduled maintenance, diagnostic troubleshooting, and component-level repairs, supported by clear instructions and technical specifications. This manual is meticulously crafted to assist both DIY enthusiasts and professional automotive technicians in ensuring the optimal performance and longevity of their vehicle.