1990 Buick Riviera Service and Repair Manual

This factory service and repair manual for the 1990 Buick Riviera applies to one trim, the Luxury, in one body, the two-door coupe. A 3.8L V6 is the sole engine listed: overhead valves, no turbocharger or supercharger, gasoline fuel. The manual provides procedures and specifications for the V6 and its fuel, ignition and cooling systems, the transaxle, and the brakes, steering and suspension, backed by wiring diagrams and diagnostics for the electrical system.

Engines covered

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

Body styles covered

• 2-door coupe

Trims covered

• Luxury

Known issues on the 1990 Riviera. NHTSA lists 4 recalls for the 1990 Riviera. On certain 1990 Riviera vehicles the transaxle shift cable could come loose from the floor shifter, leaving the driver unable to tell or select the gear and risking unexpected movement; a retaining clip was added. Another covered 10,166 certain 1990 Riviera vehicles whose rear shoulder belt retractors were misaligned, so a belt might stay locked or fail to lock in a hard stop; dealers realigned them. A third found that on certain 1990 Riviera vehicles the brake warning lamp could stay dark with the parking brake set. Of 16 owner complaints, 4 cite the hydraulic brakes and 1 reported a crash. Transaxle, brake and electrical diagnostics apply.