RPOARCHIVE
Loading index…

    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/grand-prix-gen5.md

    Interactive view →

    Rendered verbatim from the reference. Factory citations shown as ⛭ GM Heritage — …. For filtering, badges, and crosslinks, use the interactive Grand Prix — G-body (1983–1987) page.

    Pontiac Grand Prix — fifth generation, G-body (1983–1987)

    The NICB VIN manuals list this rear-drive Grand Prix (printed "Gran Prix") as a 2-door sport coupe in three car lines, the Grand Prix, Grand Prix LJ (shared with the LE from 1985) and Grand Prix Brougham, and Wikipedia adds the 1986-only 2+2 aerodynamic coupe. Engines run from the Buick 3.8L V6 (LD5) throughout, the 5.7L diesel V8 (LF9) to 1984, the Chevrolet 5.0L V8 (LG4) in 1986–1987 (the 305 of 1983–1985 is named without a code), and the fuel-injected 4.3L V6 (LB4) from 1986. No Pontiac order guide, RPO list or Heritage kit for this car is in the archive: the codes come from Wikipedia, an Eighties Cars account of the 1987 brochure, one dealer listing that decodes a 1986 2+2's options, a Conceptcarz 1985 specification page, and the Chevrolet El Camino and Monte Carlo kits, cited only for engine, transmission and axle codes the Grand Prix shares with them on the G-body platform. The options of 1983–1985 and 1987, and every paint and trim code, 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 1983–1987 the standard engine; Wikipedia's generation infobox gives LD5 for the Buick 231 V6, and its year sections name the 231 (3.8L) V6 in 1984 among the engines that continued from 1983, and as the standard engine for 1985–1987; Eighties Cars names LD5 as the 1987 standard engine; 1985–1986 rest on Wikipedia (the infobox code is undated; its 1985 and 1986 sections name the 3.8L V6 without a code), as the Monte Carlo kits print LD5 only to 1984; shared G-body code; cited from the Chevrolet Monte Carlo kit (1983–1984) ⛭ GM Heritage — 1983 Chevrolet Monte Carlo, p.30 ⛭ GM Heritage — 1984 Chevrolet Monte Carlo, p.36 confirmed
    LF9 Engine, diesel, 5.7L V8 1983–1984 Wikipedia's infobox gives LF9 for the Oldsmobile 350 diesel V8; its 1984 section names the diesel among the engines that continued from 1983, and its 1985 section says it was dropped; 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 confirmed
    LG4 Engine, 5.0L V8, 305 cu in, 4 barrel 1986–1987 Eighties Cars names LG4 for 1987 and the dealer listing of a 1986 2+2 names LG4; Wikipedia names the 305 V8 in its 1986 and 1987 sections; 1987: only with the 4 speed automatic (Eighties Cars); 1983–1985 left out: those years' sources name a 305 V8 without a code, and Wikipedia's infobox, which covers the whole generation, prints LE9 for the 305, a conflict the Monte Carlo kit cannot resolve (for 1986–1987 the dated sources print LG4, which settles it); shared G-body code; cited from the Chevrolet Monte Carlo kit ⛭ GM Heritage — 1986 Chevrolet Monte Carlo, p.32 ⛭ GM Heritage — 1987 Chevrolet Monte Carlo, p.40 confirmed
    LB4 Engine, 4.3L V6, electronic fuel injection 1986–1987 not on the 2+2; Wikipedia's infobox gives LB4, and its 1986 and 1987 sections name the fuel-injected 4.3L V6 as an option with the 3 or 4 speed automatic; Eighties Cars names LB4 for 1987; shared G-body code; cited from the Chevrolet Monte Carlo kit ⛭ GM Heritage — 1986 Chevrolet Monte Carlo, p.32 ⛭ GM Heritage — 1987 Chevrolet Monte Carlo, p.40 confirmed

    Transmissions

    Code Description Years Models/Notes Confidence
    MX1 Transmission, 3 speed automatic 1983–1987 the Grand Prix sources name a 3 speed Turbo Hydra-Matic (Wikipedia's infobox for the generation, the conceptcarz 1985 specifications, Wikipedia's 1986 section with the LB4, and Eighties Cars as the 1987 standard transmission) but print no code, so the code is matched by its meaning; shared G-body code; cited from the Chevrolet El Camino kit (1983) and the Chevrolet Monte Carlo kit (1984–1987) ⛭ GM Heritage — 1983 Chevrolet El Camino, p.5 ⛭ GM Heritage — 1984 Chevrolet Monte Carlo, p.33 ⛭ GM Heritage — 1985 Chevrolet Monte Carlo, p.30 ⛭ GM Heritage — 1986 Chevrolet Monte Carlo, p.32 ⛭ GM Heritage — 1987 Chevrolet Monte Carlo, p.40 single-source
    MX0 Transmission, 4 speed automatic, overdrive 1984, 1986–1987 Wikipedia names the 200-4R four-speed overdrive automatic as a new 1984 option with the 305 V8, and for 1986 on the 2+2 and with the LB4; Eighties Cars gives the 1987 four-speed automatic as required with the V8 and available with the LB4; no Grand Prix source prints the code, so it is matched by its meaning, and the 1986 2+2 listing gives its gearbox as MW9; 1985 is left out: no Grand Prix source read names a 1985 four-speed; the kit pages print MXO; shared G-body code; cited from the Chevrolet Monte Carlo kit ⛭ GM Heritage — 1984 Chevrolet Monte Carlo, p.33 ⛭ GM Heritage — 1986 Chevrolet Monte Carlo, p.32 ⛭ GM Heritage — 1987 Chevrolet Monte Carlo, p.40 single-source
    MW9 Transmission unit, 4 speed automatic, THM 200-4R 1986 the dealer listing of a 1986 2+2 decodes MW9 as its Turbo Hydra-Matic 200-4R; Wikipedia gives every 2+2 the 200-4R without a code; no factory page in the brief prints it single-source

    Axles

    Code Description Years Models/Notes Confidence
    G80 Axle, rear, limited slip differential 1986 the dealer listing of one restored 1986 2+2, which cannot show whether the item was ordered alone or in a group, so the row is single-source; shared G-body code; cited from the Chevrolet Monte Carlo kit ⛭ GM Heritage — 1986 Chevrolet Monte Carlo, p.32 single-source
    GU4 Axle, rear, 3.08 ratio 1986 the dealer listing of a 1986 2+2 names GU4; Wikipedia gives every 2+2 a 3.08 axle without a code single-source

    Packages & Trims

    Code Description Years Models/Notes Confidence
    Y97 Package, 2+2 1986 the dealer listing of a 1986 2+2 names Y97 as the 2+2 code and gives 1,225 built in a paragraph that follows Wikipedia's wording (so not an independent count); Wikipedia (citing the Standard Catalog of Pontiac) and TTAC give 1,118 built; Wikipedia describes the 2+2 (aero nose, bubble rear glass, fiberglass deck lid with spoiler, the 305 V8, the 200-4R and a 3.08 axle) without a code single-source

    Equipment

    Code Description Years Models/Notes Confidence
    A31 Windows, power 1986 the dealer listing of one restored 1986 2+2, which cannot show whether the item was ordered alone or in a group, so the row is single-source single-source
    AU3 Locks, power door 1986 the dealer listing of one restored 1986 2+2, which cannot show whether the item was ordered alone or in a group, so the row is single-source single-source
    C60 Air conditioning 1986 the dealer listing of one restored 1986 2+2, which cannot show whether the item was ordered alone or in a group, so the row is single-source; Eighties Cars gives 1987 air conditioning only inside the option groups, so 1987 is not claimed single-source
    CD4 Windshield wipers, intermittent 1986 the dealer listing of one restored 1986 2+2, which cannot show whether the item was ordered alone or in a group, so the row is single-source single-source
    D35 Mirrors, outside, left-hand remote, right-hand manual 1986 the dealer listing of one restored 1986 2+2, which cannot show whether the item was ordered alone or in a group, so the row is single-source single-source
    FE2 Suspension system, ride and handling 1986 the dealer listing of a 1986 2+2 names the FE2 suspension without describing it; the wording is GM's for FE2 in its later lists; the merged Regal G-body doc reads FE2 as the special Gran Touring suspension single-source
    K34 Cruise control, electronic, with resume 1986 the dealer listing of one restored 1986 2+2, which cannot show whether the item was ordered alone or in a group, so the row is single-source single-source
    N33 Steering wheel, tilt 1986 the dealer listing of one restored 1986 2+2, which cannot show whether the item was ordered alone or in a group, so the row is single-source single-source
    NP5 Steering wheel, leather-wrapped 1986 the dealer listing of a 1986 2+2 single-source

    Sources

    Factory documents (T1)

    • [HK] chevrolet/1983-Chevrolet-El-Camino.txt — cited for a shared G-body code only: 1983 price schedule (p. 5)
    • [HK] chevrolet/1983-Chevrolet-Monte-Carlo.txt — cited for shared G-body codes only: 1983 dealer order guide (p. 30)
    • [HK] chevrolet/1984-Chevrolet-Monte-Carlo.txt — cited for shared G-body codes only: 1984 price schedule and dealer order guide (pp. 33, 36)
    • [HK] chevrolet/1985-Chevrolet-Monte-Carlo.txt — cited for shared G-body codes only: 1985 dealer order guide (p. 30)
    • [HK] chevrolet/1986-Chevrolet-Monte-Carlo.txt — cited for shared G-body codes only: 1986 dealer order guide (p. 32)
    • [HK] chevrolet/1987-Chevrolet-Monte-Carlo.txt — cited for shared G-body codes only: 1987 dealer order guide (p. 40)
    • Not cited: chevrolet/1983-Chevrolet-Malibu.txt and the 1984–1987 El Camino kits, because the Monte Carlo kits already date every shared code a Grand Prix source names

    Other sources