This manual covers all LeSabre models and engine types produced between 2000 and 2005. The LeSabre, built on the GM H-body platform, is a full-size sedan renowned for its comfortable ride, spacious interior, and reliable performance, often favored by buyers seeking dependable transportation. It features a 3.8L (3800 Series II) V6 engine, available in naturally aspirated and supercharged variants, paired with a 4-speed automatic transmission. The LeSabre's engineering prioritizes a quiet and smooth driving experience, making it a strong competitor in its segment, known for its excellent build quality and quiet operation, with the 3800 Series II engine frequently recognized for its performance and refinement. This comprehensive Factory Service Repair Manual provides over 3000 pages of detailed information essential for the maintenance and repair of your LeSabre. It covers a wide range of systems, including powertrain diagnostics and rebuilding, chassis components like brakes and suspension, electrical systems with wiring diagrams and trouble codes, and comfort and convenience features such as air conditioning. The manual includes factory maintenance schedules, step-by-step repair procedures, troubleshooting guides, and technical specifications, offering dealership-level information to assist owners and technicians in performing all necessary service operations efficiently and accurately.