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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/reatta-e-body.md

    Interactive view →

    Rendered verbatim from the reference. Factory citations shown as ⛭ GM Heritage — …. For filtering, badges, and crosslinks, use the interactive Reatta — E-body derivative (1988–1991) page.

    Buick Reatta — E-body derivative (1988–1991)

    The Reatta was Buick's two-seat coupe, built from 1988 through 1991, with a convertible added for 1990 and 1991 (Wikipedia); the NICB Buick tables print the Reatta as a single car line with no trim badges. No GM order guide, data book, Heritage kit or service RPO list for the Reatta is in the archive and the brief lists no Chevrolet twin kit, so every row comes from Wikipedia's Reatta article and the Reatta Owners Journal's service-code (SPID label) page. That page prints codes for the Reatta but dates almost none of them, so only codes that Wikipedia or the page itself dates for a year are listed. Undated codes from the page, including the 1990 transmission, are left out and named in the report.

    Codes

    Engines

    Code Description Years Models/Notes Confidence
    LN3 Engine, 3.8 L V6, Buick 1988–1990 the only engine for those years; Wikipedia's infobox gives the LN3 for 1988–1990 and the Reatta Owners Journal prints "LN3 - 3.8 engine" on its Reatta service-code list (two sources agree on the code; Wikipedia dates every year); no Buick or Chevrolet factory page for the Reatta is in the archive confirmed
    L27 Engine, 3.8 L V6, Buick 3800 1991 Wikipedia's infobox and text give the L27 for 1991, replacing the LN3; the Reatta Owners Journal prints "L27 - 3800 engine" on its Reatta service-code list (two sources agree on the code; Wikipedia dates the year) confirmed

    Transmissions

    Code Description Years Models/Notes Confidence
    ME9 Transmission, automatic, 4 speed, THM 440-T4 1988–1989 the Reatta Owners Journal prints "ME9 - Transmission, auto 4 speed THM440 T4" without a year; Wikipedia's infobox names the 440-T4 for 1988–1989 but prints no code, so the code is matched to the unit by meaning; no GM list in the archive prints ME9 single-source
    M13 Transmission, automatic, 4 speed, 4T60-E 1991 the Reatta Owners Journal prints "M13 - Transmission (only found on '91 cars)", the dating remark; Wikipedia's infobox gives the 4T60-E for 1991 but prints no code, so the unit match is by meaning single-source

    Packages & Trims

    Code Description Years Models/Notes Confidence
    X22 Select Sixty edition 1988 about 55 cars for Buick's top dealers, black with tan interior; Wikipedia gives the model designation X22 for the 1988 edition; the Reatta Owners Journal lists X22 only as "believed to be marketing code for 1988 Select Sixty" single-source
    YP8 Package, merchandised, convertible 1990–1991 matched to the convertible by meaning: the Reatta Owners Journal prints "YP8 - Merchandised pkg, convertible" without a year, and Wikipedia gives the convertible for 1990 and 1991 but prints no code single-source

    Equipment

    Code Description Years Models/Notes Confidence
    AJ3 Restraint, inflatable, driver 1990 Wikipedia: the 1990 interior redesign added a driver's airbag; the Reatta Owners Journal prints "AJ3 - Restraint, inflatable, driver" without a year; later years are left out because no source read dates the airbag for them single-source
    C05 Roof, convertible, folding 1990–1991 the Reatta Owners Journal prints CO5 (letter O) without a year; GM's service lists print C05 with the same wording; Wikipedia gives the convertible for 1990 and 1991 single-source
    CA1 Sunroof 1988 Wikipedia: a sunroof became optional in late 1988; the Reatta Owners Journal prints "CA1 - Sunroof" without a year; no later year is dated by a source read single-source
    N60 Wheels, 16 inch aluminum, painted white 1990 Wikipedia: the 1990 Select Sixty convertibles carried white 16 inch wheels; the Reatta Owners Journal prints "N60 - Aluminum wheels, painted (16 inch white wheels)" without a year; matched by meaning single-source

    Paint

    Code Description Years Models/Notes Confidence
    23 Paint, Maui Blue 1990–1991 years from the Reatta Owners Journal's exterior paint list ("1990-1991 only") single-source
    33 Paint, Driftwood 1990 year from the Reatta Owners Journal's exterior paint list ("1990 only") single-source
    48 Paint, Polo Green 1991 year from the Reatta Owners Journal's exterior paint list ("1991 only") single-source
    83 Paint, Sapphire Blue 1988–1989 years from the Reatta Owners Journal's exterior paint list ("1988-1989 only") single-source
    85 Paint, Gunmetal Gray 1990–1991 years from the Reatta Owners Journal's exterior paint list ("1990-1991 only") single-source
    87 Paint, Pewter Gray 1988–1989 years from the Reatta Owners Journal's exterior paint list ("1988-1989 only") single-source

    Sources

    Factory documents (T1)

    None. No GM order guide, data book, service RPO list or Heritage kit for the Reatta is in docs/factory-docs/ or docs/heritage-ocr/, and the brief lists no Chevrolet twin kit.

    Other sources

    • https://en.wikipedia.org/wiki/Buick_Reatta — infobox (production years, engines, transmissions), features, convertible and production sections (retrieved 2026-11-05 as wikitext, action=raw)
    • https://www.reattaowner.com/roj/repair-information/paint-a-service-codes — Reatta Owners Journal, "Paint & Service Codes" (SPID label codes contributed by a club member); enthusiast page not in the tier map, used as a Reatta-specific second source for code names and for the year marks it prints (retrieved 2026-11-05; a direct fetch met a Cloudflare challenge, so it was read through the Firecrawl CLI)
    • NICB Passenger Vehicle Identification Manual, GM sections (T4): docs/reference/nicb/nicb1988-gm.txt p.38 and nicb1991-gm.txt p.35, read on the page images — the Reatta as a Buick car line (VIN positions 4 and 5 "EC") from 1988 through 1991, with no trim badges; the 1988 manual's p.39 engine table lists the Reatta coupe body type