1990 Buick LeSabre Service and Repair Manual

This factory service and repair manual for the 1990 Buick LeSabre covers two engines. The 3.8L V6 and the 5.0L V8 are both gasoline units with overhead valves and natural aspiration. Three body styles, the 4-door wagon, 2-door coupe and 4-door sedan, are offered in four trims: Base, Custom, Estate and Limited. Specifications, torque values and procedures reach the engine, fuel and ignition systems, cooling, transmission, brakes and suspension, and wiring diagrams and diagnostics cover the electrical system and body.

Engines covered

• 3.8L V6 (231 cu in) — OHV, naturally aspirated, gasoline
• 5.0L V8 (307 cu in) — OHV, naturally aspirated, gasoline

Body styles covered

• 4-door wagon
• 2-door coupe
• 4-door sedan

Trims covered

• Base
• Custom
• Estate
• Limited

Known issues on the 1990 LeSabre. For the 1990 LeSabre, NHTSA has received 46 owner complaints. The electrical system leads with 12, hydraulic service brakes and vehicle speed control follow with 7 each, seat belts account for 6 and the engine and engine cooling for 5. Eight complaints reported a crash and 5 reported an injury. The manual's wiring diagrams and diagnostics address the electrical and speed control concerns, while its procedures, specifications and torque values cover the brakes, engine and cooling system.