The 2005 Buick LeSabre is a full-size sedan built on the GM H-body platform, renowned for its comfortable ride and spacious interior. This model represents a continuation of Buick's legacy of producing reliable and well-engineered vehicles, offering a blend of practicality and comfort for everyday driving and longer journeys. With its 3.8L V6 engine, available in naturally aspirated or supercharged configurations, and a focus on a smooth driving experience, the LeSabre was designed to provide dependable transportation for its owners. This comprehensive workshop service repair manual provides detailed information for the 2005 Buick LeSabre, covering all models and trims, as well as all engine and transmission types. It serves as an invaluable resource for owners, mechanics, and technicians, offering step-by-step procedures for routine maintenance, component replacement, and major repairs. The manual includes extensive coverage of engine mechanical and electrical systems, brakes, suspension, steering, HVAC, fuel systems, and more, along with diagnostic procedures and troubleshooting guides to ensure the vehicle remains in optimal condition.