The Buick LeSabre, produced for the model years 1996 through 1999, is a full-size sedan renowned for its comfort, spacious interior, and smooth ride, making it an excellent choice for family transport and long-distance travel. Built on the H-body platform, this generation of LeSabre offered a refined driving experience, often highlighted by its robust and torquey 3.8L V6 engines, including an optional supercharged variant that provided enhanced performance. Buick's legacy of quiet, well-appointed vehicles is evident in the LeSabre's design, which aimed to deliver a high level of comfort and a serene cabin environment, distinguishing it among its contemporaries. This comprehensive factory service manual provides detailed guidance for the complete service, repair, and maintenance of the 1996-1999 Buick LeSabre. It covers all essential systems, including the 3.8L V6 powertrains (naturally aspirated and supercharged), the 4-speed automatic transmission, chassis components, and the electrical system. The manual includes step-by-step repair procedures, diagnostic flowcharts, troubleshooting guides, and essential technical specifications, enabling owners and technicians to effectively maintain and repair their vehicle, ensuring optimal performance and longevity.