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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/cadillac/seville-k-body-1980.md

    Interactive view →

    Rendered verbatim from the reference. Factory citations shown as ⛭ GM Heritage — …. For filtering, badges, and crosslinks, use the interactive Seville — K-body, front-drive (1983–1985) page.

    Cadillac Seville — K-body, front-drive (1983–1985)

    Wikipedia dates the second-generation Seville, a front-wheel-drive K-body sedan built on the E-body Eldorado, Buick Riviera and Oldsmobile Toronado platform, to 1980 through 1985 (this doc covers only 1983–1985), with production figures for each of 1983, 1984 and 1985. The 1983 and 1984 NICB manuals (1983 p. 28, 1984 p. 28) list a single Seville body, the 4-door sedan, and print a 4.1L V8 with digital fuel injection and a 5.7L V8 diesel among the Cadillac engine symbols; the 1985 manual (p. 29) is cited for the car-line name only. No GM order guide, data book, Heritage kit or RPO list for this Seville is in the archive, so only two engine codes are listed, both from Wikipedia. Both rows are single-source. No source read ties a transmission, axle, package, trim, paint or accessory code to the 1983–1985 Seville with a year.

    Codes

    Engines

    Code Description Years Models/Notes Confidence
    LF9 Engine, 5.7L V8 diesel, Oldsmobile 1983–1985 Wikipedia's Seville article lists the LF9 diesel V8 through 1985, so the whole span is dated by that one line; the NICB 1983 and 1984 Cadillac VIN tables print a 5.7L V8 diesel engine symbol but no RPO code, so they do not name the code; Wikipedia's article for the nameplate is one source single-source
    LT8 Engine, 4.1L V8, HT-4100 1983–1985 Wikipedia's Seville article lists the LT8 HT4100 V8 through 1985 (135 horsepower), and its Cadillac High Technology engine article calls LT8 the HT-4100 option code and lists the Seville (the same source family, not independent); the NICB 1983 and 1984 Cadillac VIN tables print a 4.1L V8 DFI engine symbol without a code; no Seville-specific source prints the code single-source

    Sources

    Factory documents (T1)

    No Cadillac factory document for the 1983–1985 Seville is in docs/factory-docs/ or docs/heritage-ocr/, and the brief lists no Heritage kit; no row cites a factory page.

    Other sources

    • https://en.wikipedia.org/wiki/Cadillac_Seville — second-generation section: model years, platform, engine table (LF9, LT8) and production figures (retrieved 2026-11-05 as wikitext, action=raw)
    • https://en.wikipedia.org/wiki/Cadillac_High_Technology_engine — HT-4100 option code LT8 and the Seville application list (retrieved 2026-11-05 as wikitext, action=raw; a second Wikipedia article, not an independent source)
    • NICB Passenger Vehicle Identification Manual, GM sections (T4): docs/reference/nicb/nicb1983-gm.txt p. 28 and docs/reference/nicb/nicb1984-gm.txt p. 28 — Seville 4-door sedan body and the Cadillac engine symbols; docs/reference/nicb/nicb1985-gm.txt p. 29 — Seville car-line name only (the OCR text is garbled)
    • https://www.decoderpo.com/ — home page only fetched (2026-11-05); no per-code page was reachable, so it supplied nothing