1991 Oldsmobile Cutlass Supreme Service and Repair Manual

This factory service and repair manual for the 1991 Oldsmobile Cutlass Supreme reaches across three body styles, the 2-door coupe, 4-door sedan and 2-door convertible, and three engines. The 2.3L inline-four and 3.4L V6 both use dual overhead camshafts, while the 3.1L V6 keeps overhead valves; none is turbocharged or supercharged, and all burn gasoline. Trims are Base, International and SL.

Engines covered

• 2.3L inline-four (138 cu in) — DOHC, naturally aspirated, gasoline
• 3.1L V6 (189 cu in) — OHV, naturally aspirated, gasoline
• 3.4L V6 (207 cu in) — DOHC, naturally aspirated, gasoline

Body styles covered

• 2-door coupe
• 4-door sedan
• 2-door convertible

Trims covered

• Base
• International
• SL

Known issues on the 1991 Cutlass Supreme. Two valvetrain designs appear here, so engine work differs between the dual-overhead-cam engines and the pushrod V6. Beyond the engine, the manual covers the fuel system, ignition, cooling, transmission, brakes, suspension and steering with procedures, specifications and torque values, and its wiring diagrams and diagnostics serve the electrical system on the coupe, sedan and convertible.