The Buick Regal, produced from 1997 to 2004, represents the Sixth Generation of this well-regarded mid-size sedan and coupe. Available with robust 3800 Series II V6 engines, including naturally aspirated (L36) and supercharged (L67) variants, the Regal offered a compelling blend of comfort, refined driving dynamics, and strong performance, particularly in its supercharged iteration. Its engineering quality and reliability made it a competitive option against rivals like the Ford Taurus and Toyota Camry, offering a comfortable ride with capable handling that appealed to a broad range of drivers seeking dependable transportation. This comprehensive factory service repair manual provides in-depth technical information for the Buick Regal models from 1997-2004. It covers a vast array of maintenance procedures, from routine tasks like oil changes to critical scheduled services such as timing belt replacement. The manual details engine overhaul and rebuilding, transmission servicing and repair, brake system procedures, suspension work, and electrical system diagnostics, including complete wiring diagrams and trouble code interpretation. With over 8000 pages of factory-level detail, hundreds of illustrations, and searchable text, this manual is an indispensable resource for owners and technicians aiming to maintain, diagnose, and repair the vehicle effectively and efficiently.