The 2007 Buick Lucerne represents the second generation of this full-size luxury sedan, built on the GM G-body platform. Known for its comfort-oriented ride, spacious interior, and Buick's signature QuietTuning technology, the Lucerne offered a refined driving experience. This model was available with a choice of two distinct powertrains: the robust 3.8L V6 (L26) producing 205 horsepower and 230 lb-ft of torque, or the more powerful 4.6L Northstar V8 (LD8) delivering 275 horsepower and 295 lb-ft of torque. The Lucerne aimed to provide a blend of American comfort and available performance, positioning itself as a strong contender in its segment against vehicles like the Ford Crown Victoria and Chrysler 300. This comprehensive factory service manual provides in-depth information for the 2007 Buick Lucerne, covering all trim levels including CX, CXL, and Super. The manual details maintenance procedures, routine service intervals, and fluid specifications for both the 3.8L V6 and 4.6L V8 engines. It also thoroughly explains the powertrain, chassis, and electrical systems, offering detailed troubleshooting guides, diagnostic trouble codes, and repair procedures for component removal, installation, and overhaul. Technicians and owners will find factory-level detail, including diagrams, illustrations, and wiring schematics, essential for maintaining and repairing the vehicle effectively.