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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-gen6.md

    Interactive view →

    Rendered verbatim from the reference. Factory citations shown as ⛭ GM Heritage — …. For filtering, badges, and crosslinks, use the interactive Grand Prix — W-body (1988–1996) page.

    Pontiac Grand Prix — sixth generation, W-body (1988–1996)

    The sixth-generation Grand Prix was Pontiac's front-drive W-body car for the 1988–1996 model years, a coupe from 1988 and a sedan from 1990, built in Kansas City, Kansas (Wikipedia). The NICB VIN manuals list the Grand Prix, LE and SE car lines in 1988, and the 1996 manual lists the LE, SE, GT/GTP and STE. Wikipedia names and dates the engines: the 2.8L V6 (LB6, 1988–1989), the 3.1L V6 (LH0, 1989–1993), the turbocharged 3.1L (LG5, 1989–1990), the 2.3L Quad 4 (LD2, 1990–1991), the 3.4L DOHC V6 (LQ1, 1991–1996) and the 3100 SFI V6 (L82, 1994–1996). No Pontiac order guide, data book, Heritage kit or service RPO list for this Grand Prix is in the archive. The engine and transmission rows rest on Wikipedia, on the W-Body Page (w-body.com), an enthusiast page whose transaxle table prints ME9, MG2 and M27, and on the Heritage kits of the Chevrolet Lumina and Monte Carlo, the W-body twins, which are cited only for engine and transmission codes the Grand Prix shares with them; the kits never name the Grand Prix, so they date a shared code only. The only option codes are two body packages that Wikipedia names. Every other option, paint and trim code is missing from the sources; that does not mean it was not offered.

    Codes

    Engines

    Code Description Years Models/Notes Confidence
    LB6 Engine, 2.8L (173 cu in) V6, multiport fuel injection 1988–1989 the 1988 engine, 130 hp; replaced by the 3.1L V6 midway through 1989, when the 2.8L stayed with the manual and automatic transmissions (Wikipedia); Wikipedia's 60° V6 article lists the Grand Prix under LB6 for 1988–1989, and its Grand Prix article names an MPFI 2.8 L V6 without printing the code; no listed Lumina or Monte Carlo kit page prints it single-source
    LH0 Engine, 3.1L (191 cu in) V6, multiport fuel injection 1989–1993 140 hp; Wikipedia's Grand Prix infobox prints LH0 and its 60° V6 article lists the Grand Prix under LH0 for 1989–1993, which dates every year; its 1994 section says the 3.1L was changed to the 3100 SFI (L82); the kits print LHO (letter O); shared W-body code; cited from the Chevrolet Lumina kit (1991, 1993) ⛭ GM Heritage — 1991 Chevrolet Lumina, p.18 ⛭ GM Heritage — 1993 Chevrolet Lumina, p.16 confirmed
    LG5 Engine, 3.1L V6, turbocharged, multiport fuel injection 1989–1990 the McLaren turbo engine, 205 hp, with the 4 speed automatic only (Wikipedia); Wikipedia's Grand Prix infobox prints LG5 and its 60° V6 article lists the Grand Prix Turbo under LG5 for 1989–1990 (and the Turbo STE for 1990); GM's lists read LG5 as a 7.2L diesel on other vehicles (a reused code); no kit prints it single-source
    LD2 Engine, 2.3L I4, DOHC (Quad 4) 1990–1991 the 1990 LE sedan's standard engine, with a 3 speed automatic (Wikipedia); Wikipedia's Grand Prix infobox prints LD2 and its Quad 4 article lists the Grand Prix under LD2 for 1990–1991; Wikipedia's 1992 section says the Quad 4 was dropped; no listed kit page prints it single-source
    LQ1 Engine, 3.4L V6, DOHC, multiport fuel injection 1991–1996 the GTP's engine from 1991, 210 hp with the 5 speed manual (Wikipedia); from 1994 in the GT and GTP packages; Wikipedia's Grand Prix infobox prints LQ1 and its 60° V6 article lists the Grand Prix under LQ1 for 1991–1996; the 60° V6 article dates sequential port injection from 1994, and the 1995 Monte Carlo order guide words the engine 3.4 liter SFI V6, while the 1994–1996 weight pages still write MFI; 1994–1996 stand although Wikipedia puts the 3.4L inside the GT and GTP packages, because the 60° V6 article lists the Grand Prix itself as an LQ1 application for 1991–1996 and every cited kit page prints LQ1 as an engine line of its own, not as package contents; shared W-body code; cited from the Chevrolet Lumina kit (1991, 1993, 1994, 1996) and the Chevrolet Monte Carlo kit (1995) ⛭ GM Heritage — 1991 Chevrolet Lumina, p.14 ⛭ GM Heritage — 1993 Chevrolet Lumina, p.10 ⛭ GM Heritage — 1994 Chevrolet Lumina, p.42 ⛭ GM Heritage — 1995 Chevrolet Monte Carlo, p.15 ⛭ GM Heritage — 1996 Chevrolet Lumina, p.104 confirmed
    L82 Engine, 3.1L V6, sequential fuel injection 1994–1996 the 3100 SFI V6, 160 hp, which replaced the LH0 for 1994 (Wikipedia); Wikipedia's Grand Prix infobox prints L82 and its 60° V6 article lists the Grand Prix under L82 for 1994–1999; 1994 rests on Wikipedia (no listed 1994 kit page prints it); the order guides word it 3.1 liter SFI V6, and lumina-gen2 reads GM's later lists as multiport fuel injection, high output; shared W-body code; cited from the Chevrolet Lumina kit (1995–1996) ⛭ GM Heritage — 1995 Chevrolet Lumina, p.10 ⛭ GM Heritage — 1996 Chevrolet Lumina, p.18 confirmed

    Transmissions

    Code Description Years Models/Notes Confidence
    ME9 Automatic transaxle, 4 speed (THM 440-T4) 1988–1989 the W-Body Page's transaxle table gives ME9 for the 440T4 with the 2.8L and 3.1L engines, 1988–1989 (an enthusiast page that the tier map never verified, so it is the only code source); Wikipedia names a four-speed automatic for 1988 and the only transmission with the 3.1L and the turbo in 1989; the listed Lumina kit pages 1990 p.41 (which prints ME8, not ME9), 1991 p.73 and 1992 p.55 carry no readable model year (only issue or revision dates, with MVMA-80, MVMA-91 and MVMA-82 footers, and a footer form number does not date a page), so they are not cited single-source
    MG2 Manual transaxle, 5 speed 1988–1989 the Getrag HM-282 with the 2.8L; the W-Body Page's transaxle table gives MG2 for 1988–1989 (an enthusiast page that the tier map never verified); Wikipedia names a five-speed manual with the 2.8L in 1988 and 1989, and its Getrag 282 article reads MG2 as the version for GM's V6 applications single-source
    M27 Transaxle, 5 speed manual, Getrag 1991–1993 the Getrag HM-284 with the LQ1; the W-Body Page's transaxle table gives M27 for 1991–1992 (an enthusiast page that the tier map never verified); Wikipedia's 60° V6 article gives the Getrag 284 five-speed as optional with the LQ1 in 1991–1993 without a code, and its Grand Prix article names 1993 the last year for a manual; 1993 from the Lumina kit; shared W-body code; cited from the Chevrolet Lumina kit (1993) ⛭ GM Heritage — 1993 Chevrolet Lumina, p.73 single-source
    M13 Transmission, automatic, 4 speed, 4T60-E, electronic 1993, 1995–1996 matched to the unit by meaning: Wikipedia's 4T60-E article gives the unit to the Grand Prix GT and GTP with the LQ1 for 1992–1996, and the W-Body Page names the 4T60E for 1992 on, but neither prints a code; 1992 and 1994 are left out because no listed kit page with a readable model year prints the code; the kit pages word it four speed automatic, HMD; the description follows the merged regal-w-body-1997, century-w-body and lumina-gen2 docs, while the merged lumina-gen1 doc reads M13 as Transaxle, 4 speed automatic, HMD; shared W-body code; cited from the Chevrolet Lumina kit ⛭ GM Heritage — 1993 Chevrolet Lumina, p.73 ⛭ GM Heritage — 1995 Chevrolet Lumina, p.53 ⛭ GM Heritage — 1996 Chevrolet Lumina, p.104 single-source
    MX1 Transmission, 3 speed automatic (merchandised order code) 1991, 1993 matched to the unit by meaning: Wikipedia's Grand Prix infobox gives the generation a 3 speed automatic and its 1990 section pairs it with the Quad 4 in the LE sedan, and the W-Body Page says the 3 speed automatic was dropped for 1994, but neither prints a code; 1990 and 1992 are left out because no listed kit page of those years prints the code; the merged lumina-gen1 doc reads MX1 as Transmission, 3 speed automatic; shared W-body code; cited from the Chevrolet Lumina kit ⛭ GM Heritage — 1991 Chevrolet Lumina, p.18 ⛭ GM Heritage — 1993 Chevrolet Lumina, p.16 single-source
    MX0 Merchandised transmission, automatic, provisions, overdrive 1991, 1993, 1995–1996 matched to the unit by meaning: Wikipedia names a four-speed automatic for the Grand Prix throughout, without a code; the 1991 order guide words it 4-speed automatic, the 1993–1996 guides 4-speed automatic, electronic; the kits print MXO (letter O); 1992 and 1994 are left out because no listed kit page of those years prints the code; the description follows the merged regal-w-body-1997, century-w-body and lumina-gen2 docs, while the merged lumina-gen1 doc reads MX0 as Transmission, 4 speed automatic, electronic; shared W-body code; cited from the Chevrolet Lumina kit ⛭ GM Heritage — 1991 Chevrolet Lumina, p.18 ⛭ GM Heritage — 1993 Chevrolet Lumina, p.16 ⛭ GM Heritage — 1995 Chevrolet Lumina, p.10 ⛭ GM Heritage — 1996 Chevrolet Lumina, p.18 single-source
    MM5 Transmission, 5 speed manual (merchandised order code) 1991, 1993 matched to the unit by meaning: Wikipedia names a five-speed manual with the LQ1 in 1991 and 1993 as the last year for a manual, without a code; 1988–1990 and 1992 are left out because no listed kit page of those years prints the code; the description follows the merged beretta-gen1, corsica-gen1 and cavalier-gen2 docs, while the merged lumina-gen1 doc reads MM5 as Transmission, 5 speed manual; shared W-body code; cited from the Chevrolet Lumina kit ⛭ GM Heritage — 1991 Chevrolet Lumina, p.14 ⛭ GM Heritage — 1993 Chevrolet Lumina, p.9 single-source

    Packages & Trims

    Code Description Years Models/Notes Confidence
    B4U Package, body kit 1991, 1993 Wikipedia's 1991 section gives the SE coupe's B4U package GTP bodywork and aluminum wheels, and its 1993 section calls 1993 the last year of the old-style B4U body kit; 1992 is left out because no source read names the code that year; GM-wide lists read B4U as a sport performance package single-source
    BYP Package, body cladding 1996 Wikipedia's 1995–1996 section calls 1996 the last year of the BYP body cladding package; 1994–1995 are left out because no source read names the code in those years; GM-wide lists read BYP as a sport equipment sales package single-source

    Sources

    Factory documents (T1)

    No Pontiac factory document for the 1988–1996 Grand Prix is in docs/factory-docs/ or docs/heritage-ocr/. The rows cite the Chevrolet Lumina and Monte Carlo Heritage kits (W-body twins) for shared engine and transmission codes only, on the brief's listed RPO pages, each dated by its own printed model year (owner, 2026-10-03):

    • [HK] chevrolet/1991-Chevrolet-Lumina.txt — 1991 order guide, Lumina Z-34 coupe (p. 14) and Lumina coupe and sedan (p. 18)
    • [HK] chevrolet/1993-Chevrolet-Lumina.txt — 1993 order guide, Lumina Z34 coupe power teams (p. 9), Lumina Z34 coupe (p. 10) and Lumina coupe (p. 16); MVMA specifications, 1993, optional equipment weights (p. 73)
    • [HK] chevrolet/1994-Chevrolet-Lumina.txt — MVMA specifications, 1994, optional equipment weights (p. 42)
    • [HK] chevrolet/1995-Chevrolet-Lumina.txt — 1995 order guide, Lumina sedan (p. 10); MVMA specifications, 1995, optional equipment weights (p. 53)
    • [HK] chevrolet/1995-Chevrolet-Monte-Carlo.txt — 1995 order guide, Monte Carlo Z34 coupe (p. 15); MVMA specifications, 1995, optional equipment weights (p. 72)
    • [HK] chevrolet/1996-Chevrolet-Lumina.txt — 1996 order guide, Lumina sedan (p. 18); MVMA specifications, 1996, optional equipment weights (p. 104)
    • Not cited: chevrolet/1990-Chevrolet-Lumina.txt p.41, chevrolet/1991-Chevrolet-Lumina.txt p.73 and chevrolet/1992-Chevrolet-Lumina.txt p.55, whose model-year fields are blank in the OCR (only issue or revision dates: 6-89, 9-90, 9-91); their footers print the form numbers MVMA-80, MVMA-91 and MVMA-82, and a footer form number does not date a page (owner ruling); 1990 p.41 prints ME8, not ME9

    Other sources