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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/grand-prix.md

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    Rendered verbatim from the reference. Factory citations shown as ⛭ GM Heritage — …. For filtering, badges, and crosslinks, use the interactive Grand Prix page.

    Pontiac Grand Prix — Option Codes

    The Grand Prix was a B-body full-size (1962–68), then its own G-body/A-special personal-luxury line (1969+). Pre-1969 options were ordered with Pontiac 3-digit sales codes shared with the full-size line (see fullsize.md); from 1969, corporate UPC codes. Code-level documentation for the Grand Prix is thin in public web sources — much of what follows is package/price data with codes marked as gaps. PHS documentation is the authoritative per-car source.

    Years 1962–1964

    Code Description Years Models/Notes Confidence
    — 389 4-bbl (std), 389 Tri-Power, 421, 421 HO Tri-Power engine options 1962–1964 Sales codes not documented in web sources — gap confirmed (options), code gap
    — 8-lug aluminum wheels (integral drums) 1962–1968 Signature full-size/GP option confirmed (option), code gap

    1963 GP (Style 2957) introduced the concealed-headlamp-free clean "venturi" look; consoles, bucket seats, and tachometer were standard or common options — codes shared with the full-size sales-code series.

    Years 1965–1968

    Code Description Years Models/Notes Confidence
    — 421 Tri-Power (356 hp) / 421 HO (376 hp) 1965–1966 Optional; prices per 1965 full-size fact sheet confirmed (options), code gap
    — 428 (360 hp) / 428 HO (376–390 hp) 1967–1968 Replaced 421 confirmed (options), code gap
    582 Air conditioning (division sales code) 1967–1968 Documented on Firebird sales manual; division-wide numbering single-source

    Year 1969

    New G-body Grand Prix, Model J standard; SJ option package.

    Code Description Years Models/Notes Confidence
    — Model SJ option — 428 (370 hp), lamp group, larger tires, badges 1969 UPC not confirmed in web sources confirmed (package), code gap
    — 428 HO (390 hp) 1969 SJ-optional confirmed (option), code gap
    — 400 4-bbl 350 hp (std J); 400 2-bbl 265 hp economy (auto only) 1969 confirmed (options), code gap
    — Turbo Hydra-Matic ($226–229); 4-speed manual ($226) 1969 Prices per fact sheet single-source
    — Power front disc brakes ($105); Rally II wheels ($63); AM/FM stereo ($239); leather trim ($199); capacitor (transistor) ignition ($104–115) 1969 single-source

    Years 1970–1972

    Code Description Years Models/Notes Confidence
    — SJ option package 1970–1972 $223–244 (1970), $195 (1971); incl. 455 V8 in 1970 confirmed (package), code gap
    — 455 4-bbl (370 hp ’70) 1970–1972 SJ standard; corporate 455 UPCs of this era are L75/LS5 on other lines — GP-specific UPC not confirmed confirmed (option), code gap
    — Hurst SSJ conversion — sunroof, gold accents, Hurst wheels 1970–1972 NOT a factory RPO; Hurst Performance Research conversion (272 built ’70, 157 ’71, ~60 ’72); ordered through dealers confirmed

    Years 1973–1977

    Colonnade A-special generation. Model J, SJ (through ’75) and LJ (from ’75). 400 and 455 4-bbl engines; 301/350/400 by 1977.

    Code Description Years Models/Notes Confidence
    — SJ package (455 std ’73–74) 1973–1975 UPC not confirmed — gap confirmed (package), code gap
    — LJ luxury package 1975–1977 UPC not confirmed — gap confirmed (package), code gap
    L75 455 4-bbl 1973–1976 Corporate UPC (documented on Firebird); GP application plausible but not independently confirmed for GP single-source
    L78 400 4-bbl 1973–1977 Same caveat as L75 single-source

    Years 1978–1982

    Downsized G-body. Trim lines: base, LJ, SJ (’78–80), Brougham (’81–82). Engines: 231 V6, 301 V8 (L27 2-bbl / L37 4-bbl), 305 (LG4 by ’81–82), diesel 350 (LF9) at the end of the era. Coverage gap: no two-source code-level list located for these years in this pass; the 301 UPCs (L27/L37) are confirmed only in Firebird context.

    Sources