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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/pontiac/bonneville-gen7.md

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    Rendered verbatim from the reference. Factory citations shown as ⛭ GM Heritage — …. For filtering, badges, and crosslinks, use the interactive Bonneville — G-body (1982–1986) page.

    Pontiac Bonneville — G-body, rear-drive (1982–1986)

    Wikipedia places the seventh-generation Bonneville on the rear-drive G-body platform for 1982–1986, with a Buick 231 V6, a Chevrolet 305 V8 and an Oldsmobile 350 diesel (a Buick 4.1L V6 and a Chevrolet 267 V8 are named for 1982), and says 1983 was the last year of the wagon. The NICB VIN manuals list the Bonneville and Bonneville Brougham as 4-door sedans, sport coupes and wagons, with the Bonneville LE added in 1984; Curbside Classic dates the LE to 1984. No GM order guide, data book or Heritage kit for the Bonneville is in the archive, and no Pontiac-specific source read prints a Bonneville RPO code. The four engine rows therefore match a Bonneville engine, dated by Amsoil's per-year VIN engine lists, to the code the Chevrolet Monte Carlo kits print for the same engine, which makes each one single-source. Nothing dates the 1982 codes, so 1982 has no rows, and no source read for the Bonneville names its transmissions by year, its axles, trims, equipment, paint or interior: those are a gap in the sources, not a finding that they were not offered.

    Codes

    Engines

    Code Description Years Models/Notes Confidence
    LD5 Engine, 3.8L V6, 231 cu in, 2 barrel 1983–1984 the standard engine (Curbside Classic, 1984: 3.8L 2 barrel V6); Amsoil's 1983 and 1984 Bonneville lists give the 3.8L V6 (VIN engine code A) and Wikipedia gives the Buick 231 V6, but none prints the code, so it is matched by meaning; the Bonneville also had the 3.8L V6 in 1985 and 1986 (Amsoil), but the 1985 and 1986 Monte Carlo kits do not print LD5, so those years are not claimed; shared G-body code; cited from the Chevrolet Monte Carlo kit ⛭ GM Heritage — 1983 Chevrolet Monte Carlo, p.30 ⛭ GM Heritage — 1984 Chevrolet Monte Carlo, p.36 single-source
    LG4 Engine, 5.0L V8, 305 cu in, 4 barrel 1983–1986 optional V8; Amsoil's 1983 to 1986 Bonneville lists give the 5.0L V8 (VIN engine code H), Wikipedia gives the Chevrolet 305 V8 and Curbside Classic gives the 1984 optional 5.0L V8 at 150 hp; none prints the code or says 4 barrel, so both are matched through the kit's 5.0 Liter 4 BBL V8; Wikipedia's Grand Prix article prints LE9 for the 305 on the same G-body, so the Bonneville's 1983–1985 305 may have been the 2-barrel LE9 instead; shared G-body code; cited from the Chevrolet Monte Carlo kit ⛭ GM Heritage — 1983 Chevrolet Monte Carlo, p.30 ⛭ GM Heritage — 1984 Chevrolet Monte Carlo, p.36 ⛭ GM Heritage — 1985 Chevrolet Monte Carlo, p.30 ⛭ GM Heritage — 1986 Chevrolet Monte Carlo, p.32 single-source
    LF9 Engine, diesel, 5.7L V8 1983–1984 optional; Amsoil's 1983 and 1984 Bonneville lists give the 5.7L diesel V8 (VIN engine code N), Wikipedia gives the Oldsmobile 350 diesel and Curbside Classic names an optional diesel for 1984; none prints the code; shared G-body code; cited from the Chevrolet Monte Carlo kit ⛭ GM Heritage — 1983 Chevrolet Monte Carlo, p.30 ⛭ GM Heritage — 1984 Chevrolet Monte Carlo, p.36 single-source
    LB4 Engine, 4.3L V6, electronic fuel injection 1986 only Amsoil's 1986 Bonneville list gives a 4.3L V6 (VIN engine code Z); Wikipedia's Bonneville article does not name it, and no Pontiac source prints the code, so it is matched by meaning; Amsoil's 1985 list has no 4.3L V6, so 1985 is not claimed; shared G-body code; cited from the Chevrolet Monte Carlo kit ⛭ GM Heritage — 1986 Chevrolet Monte Carlo, p.32 single-source

    Sources

    Factory documents (T1)

    • [HK] chevrolet/1983-Chevrolet-Monte-Carlo.txt — cited for shared G-body engine codes only: 1983 dealer order guide, Monte Carlo sport coupe page (p. 30)
    • [HK] chevrolet/1984-Chevrolet-Monte-Carlo.txt — cited for shared G-body engine codes only: 1984 dealer order guide (p. 36)
    • [HK] chevrolet/1985-Chevrolet-Monte-Carlo.txt — cited for a shared G-body engine code only: 1985 dealer order guide (p. 30)
    • [HK] chevrolet/1986-Chevrolet-Monte-Carlo.txt — cited for shared G-body engine codes only: 1986 dealer order guide (p. 32)
    • Not cited: the kits' alphabetical option index pages (rule 11(i)); the El Camino and Malibu kits, because the Monte Carlo kits already print every shared engine code a Bonneville source names; the transmission (MX1, MX0) and axle (G80) codes the Monte Carlo kits print, because no Bonneville-specific source read names a Bonneville transmission or axle by year, so nothing ties them to this car

    Other sources