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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/lesabre-b-body.md

    Interactive view →

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

    Buick LeSabre — B-body, rear-drive (fifth generation) (1983–1985)

    The 1983–1985 LeSabre was the last of the rear-drive fifth generation, a B-body coupe and sedan in Custom and Limited models (Wikipedia), which the NICB manuals list as the LeSabre, LeSabre Custom and LeSabre Limited car lines, built at Flint and Fairfax (1983 NICB manual); the wagon of these years is covered by the Estate Wagon doc. Wikipedia gives the 231 cu in V6 as the standard engine, the 252 cu in V6 as an option for 1983 only, and the Oldsmobile 307 V8 and 350 diesel V8 as options in all three years. No GM order guide, data book, Heritage kit or RPO list for the LeSabre is in the archive, so only powertrain codes are listed: gnttype.org's per-year Buick VIN tables and Wikipedia's engine articles name and date the engine codes, and the Chevrolet Caprice kits, the B-body twin, are cited only for the shared codes LD5, LF9 and MX0. No source read ties an option, package, axle, paint or trim code to the LeSabre with a year, so none is listed.

    Codes

    Engines

    Code Description Years Models/Notes Confidence
    LD5 Engine, 3.8L V6, 231 cu in, 2 barrel 1983–1985 the standard engine of the coupe and sedan (VIN code A); Wikipedia's LeSabre article names the 231 V6 in each of these years but prints no code, so the code is matched to the car by meaning; gnttype.org's 1984 and 1985 Buick VIN tables print it for the LeSabre Custom and Limited; 1984 rests on those two non-kit sources (the 1984 kit's LD5 page has no readable model year, and its dated page names LD5 only beside LC3); shared B-body code; cited from the Chevrolet Caprice kit ⛭ GM Heritage — 1983 Chevrolet Caprice, p.17 ⛭ GM Heritage — 1985 Chevrolet Caprice, p.40 single-source
    LC4 Engine, 4.1L V6, 252 cu in, 4 barrel 1983 optional (VIN code 4); Wikipedia's LeSabre article names the 252 V6 as a 1983 option, dropped for 1984, and its Buick V6 article prints LC4 for the LeSabre; gnttype.org's 1983 Buick VIN table prints it for the LeSabre but repeats its 1984 table word for word, so it is not counted as a second source; 1984 and 1985 are left out: gnttype.org's 1984 and 1985 tables and the Buick V6 article's application line also give it, but the LeSabre article says it was dropped for 1984, and the 1985 NICB manual's Buick engine table prints VIN code 4 in its 1984 column but not in its 1985 column single-source
    LV2 Engine, 5.0L V8, 4 barrel, 307 cu in 1983–1985 the Oldsmobile 307 V8 (VIN code Y), optional on the coupe and sedan; Wikipedia's Oldsmobile V8 article prints LV2 for the LeSabre through 1985 and its LeSabre article names the 307 in each of these years; gnttype.org's 1984 and 1985 Buick VIN tables print it for the LeSabre (its 1983 table repeats the 1984 table word for word, so 1983 rests on Wikipedia alone); the Caprice kits of these years show the Chevrolet 305 (LG4) instead, so no factory page prints the code single-source
    LF9 Engine, diesel, 5.7L V8 1983–1985 the Oldsmobile 350 cu in diesel (VIN code N), optional; Wikipedia's Oldsmobile Diesel article prints LF9 for the LeSabre through 1985 and its LeSabre article names the 350 diesel in each of these years; gnttype.org's 1984 and 1985 Buick VIN tables print it for the LeSabre; the 1984 kit citation is p.40's heavy-duty battery remark (with RPO-LF9 diesel); shared B-body code; cited from the Chevrolet Caprice kit ⛭ GM Heritage — 1983 Chevrolet Caprice, p.13 ⛭ GM Heritage — 1984 Chevrolet Caprice, p.40 ⛭ GM Heritage — 1985 Chevrolet Caprice, p.18 confirmed

    Transmissions

    Code Description Years Models/Notes Confidence
    MX0 Transmission, 4 speed automatic, overdrive 1984–1985 matched to the unit by meaning: Wikipedia's LeSabre infobox names the THM200-4R four-speed automatic for the generation but prints no code and no year; the 1984 page prints MXO; each page prints its own model year; 1983 is left out because the 1983 Caprice kit shows an overdrive automatic with no code; shared B-body code; cited from the Chevrolet Caprice kit ⛭ GM Heritage — 1984 Chevrolet Caprice, p.39 ⛭ GM Heritage — 1985 Chevrolet Caprice, p.41 single-source

    Sources

    Factory documents (T1)

    No Buick factory document for the 1983–1985 LeSabre is in docs/factory-docs/ or docs/heritage-ocr/. The rows cite the Chevrolet Caprice Heritage kits (B-body twin) for shared engine and transmission codes only, on the brief's listed RPO pages (owner, 2026-10-03):

    • [HK] chevrolet/1983-Chevrolet-Caprice.txt — MVMA specifications, model year 1983, engine pages (pp. 13, 17)
    • [HK] chevrolet/1984-Chevrolet-Caprice.txt — MVMA specifications, model year 1984, optional equipment weights (pp. 39, 40)
    • [HK] chevrolet/1985-Chevrolet-Caprice.txt — MVMA specifications, model year 1985, engine and transmission page (p. 18) and optional equipment weights (pp. 40, 41)

    Other sources