Buick — Option Code Reference (1960–1982)
Division index for Buick Motor Division option codes, covering Skylark / Gran Sport / GSX, Riviera, Special, the full-size line (LeSabre, Wildcat, Electra), Regal, Century, and Apollo.
Model documents
| Document | Models covered | Years |
|---|---|---|
| skylark-gs.md | Special, Skylark, GS 340/350/400/455, Gran Sport, GSX, Apollo | 1961–1982 |
| riviera.md | Riviera (incl. Gran Sport, boattail, S Type) | 1963–1982 |
| fullsize.md | LeSabre, Wildcat, Electra 225, Estate Wagon, Centurion | 1960–1982 |
| regal-century.md | Century (Colonnade & downsized), Regal, Regal Sport Coupe (turbo), 1982 Grand National | 1973–1982 |
Buick's two numbering systems (important)
Sources for classic Buicks show two distinct code systems, and they are frequently confused:
- Buick dealer ordering / accessory codes — short letter+digit codes
(
A1,A9,B4,H6,I-6, …) printed on Buick's own dealer order forms and option sheets through roughly 1972. These are Buick-internal, are reused with different meanings on different car lines in the same year (e.g. in 1970,A9= Riviera GS option on the full-size sheet, whileA9= GSX package on the intermediate/GS line, andA1= Stage 1 on the GS 455), and also change meaning year-to-year. - GM corporate RPO codes — three-character codes (
G80,M21,LC8,WE2, …) used on build sheets / production broadcast copies, and used exclusively on window stickers and order forms from the mid-1970s onward. These are consistent corporate-wide within a year.
A decoded vehicle's trunk-lid service label or build sheet shows RPO codes; period Buick sales literature and many enthusiast writeups quote the dealer ordering codes. Both are tabulated in the model docs, with the system noted where sources distinguish them.
Master code table (headline codes)
| Code | Description | Years | Models/Notes | Confidence |
|---|---|---|---|---|
| A1 | Stage 1 performance option (dealer ordering code) — 455 "Stage 1" engine, low-restriction dual exhaust, performance axle w/ posi, H.D. radiator, ornamentation | 1969–1970 | GS 400 (1969), GS 455 (1970); 1970 verified on factory option sheet, 1969 usage single-source | confirmed (1970) / single-source (1969) |
| A9 | GSX package (dealer ordering code) — spoilers, hood tach, stripes, Rallye suspension, bucket interior | 1970 | GS 455 only; Saturn Yellow or Apollo White | confirmed |
| A9 | Riviera Gran Sport option (dealer ordering code) | 1965–1970 | Riviera; $306.38 in 1965 | confirmed |
| A8 | Super Wildcat 425 dual-quad engine option (1965 Riviera) / High Performance Group 350-4bbl (1970 intermediates) | 1965 / 1970 | Meaning differs by year/line | confirmed |
| Y48 | Super Wildcat 425 dual 4-bbl V8, 360 hp | 1964 | Riviera | single-source |
| H6 | Rallye Ride Control Package (dealer ordering code) | 1970 | GS, GS 455; included in GSX | confirmed |
| G80 | Positive traction (limited-slip) differential — corporate RPO | 1970–1982 | All lines | confirmed |
| KF2 | Wheel spin control ("Max Trac") — corporate RPO | 1971–1974 | Riviera and full-size | single-source (mapping) |
| M20 / M21 | Muncie 4-speed manual, wide / close ratio — corporate RPO | 1970–1974 | GS, Century GS | confirmed |
| M40 | Turbo Hydra-Matic 400 — corporate RPO (dealer code B2) | 1970–1976 | GS 455, full-size, Riviera | confirmed |
| L72 | 455 CID 2-bbl V8 — corporate RPO (Buick usage) | 1971–1976 | Full-size | single-source |
| LD5 | 3.8L (231) V6 2-bbl — corporate RPO | 1977–1982 | Regal, Century, LeSabre, Skylark | confirmed |
| LC8 | 3.8L V6 Turbocharged, 4-bbl | 1978–1980 | Regal Sport Coupe, LeSabre Sport Coupe, Century Turbo Coupe, Riviera S Type | single-source |
| Y47 | Turbo Regal performance package — dual exhaust (resonator) system, higher-stall converter, 3.08 axle | mid-1981–1982 | Regal Sport Coupe | single-source |
| Y44 | Sport Coupe Decor Package — Designers' Accent paint, blackout trim | 1982 | Regal Sport Coupe | single-source |
| N78 | Cast aluminum wheels | 1982 | Regal | single-source |
| WE2 | Grand National package (215 built) | 1982 | Regal; code later reused 1984–87 | confirmed |
| B97 | Spoiler — corporate RPO | 1970–1976 | GS/GSX-era A-body | single-source |
| V (VIN 5th char) | Stage 1 455 engine identification in VIN (not an option code) | 1972–1974 | GS Stage 1, Century GS Stage 1 | confirmed |
Coverage gaps
- 1960–1964 full-size and Special/Skylark ordering codes: no reliable online code tables located; only narrative sources. Codes for these years are largely undocumented here.
- 1965–1969 year-by-year dealer code sheets: only the 1970 sheets (intermediate + full-size) are transcribed online at TeamBuick; 1965–69 and 1971–72 sheets were not found in machine-readable form.
- 1975–1982 Skylark (X-body) and 1979–82 Riviera (E-body): only partial RPO coverage.
- GM Heritage Center order-guide PDFs for these years were not directly
retrievable during compilation and would upgrade many
single-sourceentries.
Division sources
- TeamBuick — 1970 Options, Intermediate Size Buicks: https://www.teambuick.com/reference/dealer_code_70_intermediate.php
- TeamBuick — 1970 Options, Regular Size Buicks: https://www.teambuick.com/reference/dealer_code_70_regular.php
- TeamBuick — 1970–1976 Buick Option Codes and Production Options (RPO): https://teambuick.com/reference/ident_option-codes_70-76.php
- Factory Stage 1 Registry — Stage 1 identification: http://www.stage1registry.com/stage1info.html
- GSX Home Page — 1970 GSX production information: http://www.buickgsx.com/1970gsxinfo.htm
- Riviera Owners Association — 1965 Gran Sport: https://rivowners.org/features/Ev_Stats/65gs/
- Riviera Owners Association — 1963–65 options & accessory codes: https://rivowners.org/features/Ev_Stats/colortrim/options.html
- TriShield.com — Buick option / trunk-label codes: http://www.trishield.com/Directory/optioncodes.shtml
- Before Black — Turbo Regal history (1978–1983): http://www.beforeblack.net/regal.htm
- GNTTYPE — Turbo Regal RPO codes (1985–87 only; checked, out of scope): https://www.gnttype.org/numbers/rpo.html
- BuickTurboRegal.com — RPO WE2 Grand National appearance package: https://buickturboregal.com/rpo-option-we2-grand-national-appearance-package/
- Horsepower Memories — 1970 Buick GSX (A9 contents): https://horsepowermemories.com/2018/07/03/1970-buick-gsx/
- Curbside Classic — 1978 Regal Sport Coupe (LC8): https://www.curbsideclassic.com/blog/auction-classic/1978-buick-regal-sport-coupe-unrestored-first-year-turbo-regal-1978s-performance-car-of-the-future/
- Curbside Classic — 1973 Century GS 455 Stage 1: https://www.curbsideclassic.com/blog/auction-classic/1973-buick-century-gran-sport-455-stage-1-one-of-just-365-4-speed-buick-colonnades/
- Hagerty — 1973 GS Stage 1 four-speed: https://www.hagerty.com/media/car-profiles/the-1973-buick-gs-stage-1-four-speed-is-a-rare-forgotten-muscle-machine/
- Barn Finds — 1974 Century GS Stage 1 production: https://barnfinds.com/1-of-478-1974-buick-century-gran-sport-stage-1/
- autoevolution — 1969 GS 400 Stage 1 (A1 ordering code): https://www.autoevolution.com/news/rare-original-one-owner-1969-buick-gs-400-stage-1-is-all-wrong-year-engine-and-price-247963.html
- MotorCities — 1971–73 boattail Rivieras: https://www.motorcities.org/story-of-the-week/2020/the-1971-73-buick-rivieras-offered-great-boattail-designs
- Buick-Riviera.com (boattail site): https://www.buick-riviera.com/
- HowStuffWorks — 1965–1967 Buick Gran Sport: https://auto.howstuffworks.com/1965-1967-buick-gran-sport.htm
- DrivingLine — Buick 455 / turbo V6 histories: https://www.drivingline.com/articles/a-history-of-the-buick-455-v8-gms-overlooked-big-block-v8/, https://www.drivingline.com/articles/history-of-the-turbocharged-buick-38l-v6-gms-mightiest-80s-muscle-car-motor/
- Aldan American — first-generation Riviera (Y48): https://aldanamerican.com/blog/development-and-styling-of-the-first-generation-buick-riviera-a-premium-personal-luxury-coupe/