The 2003 Trail Blazer is a versatile All-Terrain Vehicle (ATV) designed for recreational riders and trail enthusiasts. Available in 250cc and 400cc engine variants, this Sport/Utility ATV offers a balance of performance and agility, making it suitable for both light utility tasks and enjoyable trail riding. Notable features include independent front suspension for enhanced comfort and handling, a robust automatic Continuously Variable Transmission (CVT) with selectable gears, and hydraulic disc brakes for reliable stopping power. Engineered in the USA, the Trail Blazer line has a history of providing a capable and user-friendly experience for entry-level to intermediate ATV users. This comprehensive factory service manual provides in-depth guidance for the maintenance, repair, and troubleshooting of the 2003 Trail Blazer 250 and 400 models. It covers all essential systems, including detailed procedures for engine overhaul, transmission and drivetrain service, fuel and electrical systems, brakes, suspension, steering, and chassis. The manual includes routine maintenance schedules, diagnostic charts for common issues, and step-by-step instructions for complex repairs, ensuring owners and technicians have the information needed to keep the vehicle in optimal condition. With over 300 pages of detailed information, this English-language manual is an indispensable resource for ensuring the longevity and performance of your ATV.