1991 Buick Park Avenue Service and Repair Manual

This factory service and repair manual for the 1991 Buick Park Avenue follows a four-door sedan offered in two trims, Base and Ultra. Power comes from a 3.8L V6 displacing 231 cubic inches, with pushrod overhead valves, in two forms: one breathing naturally and one fed by a supercharger, both running on gasoline. Procedures, specifications and torque values are given for the engine, fuel and ignition systems, the transmission, brakes, steering and suspension, with wiring diagrams and diagnostics for the electrical system.

Engines covered

• 3.8L V6 (231 cu in) — OHV, naturally aspirated, gasoline
• 3.8L V6 (231 cu in) — OHV, supercharged, gasoline

Body styles covered

• 4-door sedan

Trims covered

• Base
• Ultra

Known issues on the 1991 Park Avenue. One recall appears in the federal record for the 1991 Park Avenue. It covered certain 1991 Park Avenue passenger cars whose parking brake lever could slip back by a tooth or more once set, easing tension on the rear brake cable so the parked car might roll; the fix was a new lever assembly. Owners have logged 92 complaints, 56 of them about the hydraulic service brakes, with the electrical system at 10 and engine and cooling and the power train at 7 apiece. Of those complaints, 14 reported a crash, 6 a fire and 4 an injury. The brake procedures, torque values and diagnostics here address those systems directly.