The Chevrolet Aveo, specifically the T250/T255 generation produced from 2007 to 2010, is a subcompact car designed to offer an affordable and practical transportation solution. Built on GM's global small car platform, this model was engineered to compete in a segment known for value-conscious buyers, small families, and commuters. Available with either a 1.4L or 1.6L inline-4 DOHC engine, the Aveo offered a choice between a 5-speed manual or a 4-speed automatic transmission, prioritizing fuel economy and straightforward operation. Its compact dimensions, including a wheelbase of approximately 98.4 inches and a length of about 161.3 inches, made it maneuverable in urban environments. While consumer ratings were mixed, often highlighting its value proposition, the Aveo provided essential features and a functional interior for its class. This comprehensive factory service manual provides in-depth guidance for the maintenance and repair of the Chevrolet Aveo T250/T255. Covering all major vehicle systems, including engine mechanicals, engine management, transmissions (manual and automatic), drivetrain, suspension, steering, brakes, electrical systems, body and chassis, HVAC, and safety systems, this manual offers detailed procedures. Users will find step-by-step instructions for scheduled maintenance, diagnostic troubleshooting, component repair, and even overhaul procedures. Critical technical specifications, tightening torques, and wiring diagrams are also included, making this manual an indispensable resource for owners, technicians, and mechanics seeking to ensure the optimal performance and longevity of their Aveo.