The 1991 Buick Roadmaster Estate represents a premium, full-size luxury station wagon, built on the robust B-body platform. As a successor to iconic 'Woody' models, it offered a spacious, long-wheelbase design with rear-wheel drive and the option of distinctive woodgrain exterior trim. This vehicle was engineered for comfort and capability, powered by a substantial 5.7L V8 engine featuring Tuned Port Injection (TPI) or Central Sequential Fuel Injection (CSFI), delivering ample torque for towing and cruising. Its generous dimensions, including a 116-inch wheelbase and over 219 inches in length, provided exceptional interior and cargo space, positioning it as a strong contender against rivals like the Ford Country Squire and Mercury Grand Marquis Colony Park. This comprehensive service and repair manual provides detailed, factory-level information for all repairs and maintenance on the 1991 Buick Roadmaster Estate. It covers every aspect of the vehicle, from engine mechanicals, fuel, emission, cooling, lubrication, and ignition systems to the starting and charging system. In-depth guidance is also provided for the automatic transmission, driveshaft, differential, suspension, steering, and brake systems, including ABS. Furthermore, the manual details the electrical system, HVAC, and safety restraint systems, offering step-by-step diagnostic procedures, maintenance schedules, fluid specifications, and complete repair instructions. This resource is invaluable for owners, mechanics, and technicians seeking to maintain, diagnose, and repair this classic vehicle with precision and accuracy.