The service and repair manual for the 1991 Buick Riviera — the 3.8L V6 engine, 1 trim. Matched to this exact model year, so the specifications and sequences are the ones Buick published for your car, not figures carried over from a neighbouring year.
01 / FitmentWhat this manual covers
| Model year | 1991 |
|---|---|
| Engines | 3.8L V6 — 232 cu in, OHV |
| Trims | Luxury Coupe 2-Door |
| Federal record | 1 recall · 16 complaints · 4 technical service bulletins (refreshed 2026-08-21) |
02 / InsideSample pages from the 1991 Riviera manual
03 / ContentsSections in the manual
- Quick Lookups 68
- General Information 1,529
- Accessories & Equipment 321
- Heating, Ventilation & A/C (HVAC) 254
- Body & Frame 190
- Maintenance 55
- Brakes 170
- Restraints 175
- Drivelines & Axles 22
- Steering 128
- Electrical 166
- Suspension 111
- Engine Mechanical 130
- Transmission 578
- Engine Performance 1,504
04 / Known issuesRecalls on federal record for the 1991 Riviera
- Seat Belts — front › webbing · 95V110000This condition can prevent a person from using their restraint system resulting in an increased risk.
Owners have filed 16 complaints and Buick has issued 4 technical service bulletins for the 1991 Riviera. The manual carries the manufacturer's diagnostic and repair procedures behind these systems.
FAQQuestions about the 1991 Riviera manual
Is this manual specific to the 1991 Riviera?
Yes. It is the OEM manual matched to the 1991 model year, covering the 3.8L V6 across the Luxury Coupe 2-Door trims. Specifications and procedure sequences are the ones Buick published for this year.
What 1991 Riviera problems does it help with?
1 recall is on federal record for the 1991 Riviera, covering seat belts. The manual carries the manufacturer's diagnostic and repair procedures for those systems; the recall repairs themselves are done free by Buick dealers.
Does it include 1991 Riviera wiring diagrams?
Yes — the complete wiring diagrams for the 1991 build, alongside repair procedures, specifications and diagnostics.
Is it a subscription?
No. $29.99 once and the manual is yours. It is a digital manual — nothing ships; access details arrive by email after checkout and it works on any device.
RelatedOther Riviera years and 1991 Buick models
1997 Riviera · 1996 Riviera · 1995 Riviera · 1993 Riviera · 1992 Riviera · 1990 Riviera · 1989 Riviera · 1988 Riviera · 1987 Riviera · 1986 Riviera · 1985 Riviera · all 17 years
1991 Buick Century · 1991 Buick Commercial Chassis · 1991 Buick LeSabre · 1991 Buick Park Avenue · 1991 Buick Reatta · 1991 Buick Regal · 1991 Buick Roadmaster · 1991 Buick Skylark · every 1991 model