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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.

    Source document

    docs/rpo/buick/riviera.md

    Interactive view →

    Rendered verbatim from the reference. Factory citations shown as ⛭ GM Heritage — …. For filtering, badges, and crosslinks, use the interactive Riviera page.

    Buick Riviera (1963–1982)

    Personal-luxury E-body (B-body based through 1965; E-body 1966-on; downsized B-frame 1977–78; FWD E-body 1979-on). Includes the Gran Sport (A9) option, the 1971–73 boattail, and the 1979–82 S Type / T Type turbos.

    Code systems: 1960s Rivieras show Fisher Body accessory group codes on the body plate, Buick dealer ordering codes (A8, A9, H-2, …) in sales literature, and corporate RPO codes on build records. See division README.

    Years 1963–1965 {#year-1963}

    Code Description Years Models/Notes Confidence
    Y48 Super Wildcat 425 cid dual 4-bbl V8, 360 hp (corporate RPO) 1964 Riviera single-source
    A8 Super Wildcat 425 dual-quad engine option (dealer code); 454 sold without GS package in 1965 1965 Riviera confirmed
    A9 Gran Sport option, $306.38: 360 hp Super Wildcat dual 4-bbl (engine code LX, chromed twin-snorkel air cleaner, finned aluminum valve covers), modified exhaust & TH-400, posi w/ 3.42 axle, ornamentation, wheel covers 1965 Riviera; 3,354 built confirmed
    H-2 Ride and Handling package: quicker steering, firmer suspension 1965 Riviera; extra-cost companion to A9 confirmed

    Fisher Body accessory codes (body-plate groups, 1963–65, per ROA — partial list, meanings abbreviated): Group 1 letters E, W, X, N, G, F, T, Y, R, S, M, U, D, K (power windows, seats, locks, trunk release); Group 2 2A–2R (upholstery, paint, heater delete, A/C, transmission, lighting, speakers); Group 3 3E, 3W, 3B, 3S, 3V (crash pad); Group 4 4F (remote mirror); Group 5 5Z, 5W, 5K (seat belts, door moldings). Confidence: single-source (ROA).

    Dealer-installed accessories (1963–65, ROA): Superlift shocks, cornering lights, Twilight Sentinel, dash tachometer (1964–65, $55), rear-window defroster, remote mirror, trunk release, compass, reverberator (1965).

    Years 1966–1970 {#year-1966}

    Code Description Years Models/Notes Confidence
    A9 Riviera GS option (dealer ordering code): performance axle/posi, ride-and-handling chassis, ornamentation; 1970 listing verbatim "Riviera GS Option" 1966–1970 Riviera; verified on 1970 factory full-size sheet; 1965 usage confirms continuity confirmed
    A7 / A8 High-performance engine / engine group codes on full-size sheet 1970 Shared with full-size line — see fullsize.md confirmed
    B2 Turbo Hydra-Matic 400 1970 Riviera (std/required) confirmed
    C1 / C6 / C7 Power disc brakes / steering / brakes 1970 Riviera confirmed
    H2 / H3 Ride & handling / automatic level control 1970 Riviera & full-size confirmed
    I-5 Automatic Climate Control A/C 1970 Riviera & full-size confirmed
    K2 Cornering lights 1970 Riviera & full-size confirmed
    M9 Heated-glass rear window defroster 1970 Riviera confirmed
    S6 / S7 Cruise Master / tilt wheel 1970 Riviera confirmed
    X3 Rim-blower steering wheel 1970 Riviera confirmed

    The remaining 1970 letter-codes (D-radio, F-tire, G-axle, J-belt, L-glass, O/P/Q/R/T/U/V/W appearance & convenience) are shared with the full-size sheet — full table in fullsize.md.

    Years 1971–1973 — boattail {#year-1971}

    Code Description Years Models/Notes Confidence
    — (GS option) Riviera GS: specially calibrated TH-400, HD suspension, posi, chrome air-cleaner top, H78x15 tires, GS fender monograms; $200 in 1972 (455 4-bbl, 330 hp gross-'71/net-'72 ratings differ) 1971–1973 Boattail Riviera confirmed
    KF2 Wheel Spin Control (corporate RPO) — believed to be the Max Trac electronic traction control option 1971–1974 Riviera (Max Trac offered 1971–72 per parts sources; RPO-to-name mapping single-source) single-source
    G80 Positive traction differential (RPO) 1971–1976 Riviera confirmed
    C61 Automatic climate control A/C (RPO) 1971–1976 Riviera single-source
    N37 Tilt & telescoping steering column (RPO) 1971–1976 Riviera single-source
    G67 Rear air-lift shocks, automatic level control (RPO) 1971–1976 Riviera single-source
    U35 / U63 Electric clock / AM radio (RPO) 1970–1976 Riviera single-source

    1973 was the last year for the GS handling/performance option on the boattail; the 455 Stage 1 was not offered on the Riviera (no source found claiming a factory Riviera Stage 1) — treat any such claim as unverified.

    Years 1974–1978 {#year-1974}

    Notchback restyle 1974–76 (455 std.), downsized B-body 1977–78 (350/403). No Riviera-specific option code tables located online — coverage gap. Applicable corporate RPOs from the 1970–76 Buick list: L72 (455 2-bbl, full-size usage), C61, G80, N37, AT8 (50/50 reclining passenger seat), CF5 (Astroroof, electric). Confidence: single-source.

    Years 1979–1982 — E-body FWD {#year-1979}

    Code Description Years Models/Notes Confidence
    — (S Type) Riviera S Type: 3.8L V6 turbo (4-bbl, ~185 hp in '79–'80 E-body tune), Gran Touring-style suspension, blackout trim 1979–1981 Riviera; Motor Trend 1979 Car of the Year context confirmed (model)
    LC8 3.8L V6 turbocharged 4-bbl (corporate RPO as used on carbureted turbo Buicks) 1979–1982 Riviera S Type / T Type; RPO attribution to Riviera single-source single-source
    — (T Type) T Type replaced S Type designation 1982 Riviera confirmed (model)

    Detailed 1979–82 Riviera RPO tables (window-sticker level) were not located — coverage gap; the ROA production/statistics pages document totals but not per-code lists.

    Sources