This manual covers the 1998 Buick Riviera, an 8th Generation model renowned for its blend of performance and comfort. As a personal luxury coupe, it competed in a segment that valued sophisticated styling, a smooth ride, and a quiet cabin. The Riviera offered potent V6 engine options, including a supercharged variant, paired with a refined automatic transmission, and often featured advanced suspension systems for its time. Its distinctive design and focus on a grand touring experience positioned it as a notable American automobile. This workshop service repair manual is intended for all models, engines, and trim levels of the 1998 Riviera. This comprehensive workshop service repair manual provides detailed information for maintaining and repairing the 1998 Buick Riviera. It covers every service and repair procedure across all vehicle systems, including engine (naturally aspirated and supercharged V6 variants), automatic transmission, drivetrain, brakes, suspension, steering, electrical systems, HVAC, and body. The manual includes essential maintenance schedules, troubleshooting guides, diagnostic procedures, and technical specifications such as torque values and fluid capacities. Whether you are a vehicle owner performing routine maintenance or a professional technician undertaking complex repairs, this manual in English offers the in-depth knowledge required to ensure the optimal performance and longevity of your Riviera.