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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/century-w-body.md

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    Rendered verbatim from the reference. Factory citations shown as ⛭ GM Heritage — …. For filtering, badges, and crosslinks, use the interactive Century — W-body (1997–2005) page.

    Buick Century — W-body (sixth generation) (1997–2005)

    The sixth-generation Buick Century was a four-door W-body sedan sold in Custom and Limited series with a 3.1L V6 (L82 through 1999, LG8 from 2000) and a 4 speed automatic. GM's RPO code lists for it exist for 1998 through 2005 and every row comes from them; the archive has none for 1997, which NICB's VIN manual shows with Custom and Limited series. The 1998–2004 lists are word for word the Regal's, so a code may be Regal equipment; the 3.8L L36 and supercharged L67 engines they carry are left out, because NICB's engine tables show only a 3.1L V6 for the Century. The 1999–2005 lists carry the Oshawa 2 plant code.

    Codes

    Engines

    Code Description Years Models/Notes Confidence
    L82 Engine, gas, 6 cylinder, 3.1 liter, multiport fuel injection, high output, V6 1998–1999 Wikipedia gives the 3.1L L82 to the 1997–1999 Century ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    LG8 Engine, gas, 6 cylinder, 3.1L, sequential fuel injection, V6, GM 2000–2005 Wikipedia gives the 3.1L LG8 to the 2000–2005 Century ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed

    Transmissions

    Code Description Years Models/Notes Confidence
    M13 Transmission, automatic, 4 speed, 4T60-E, electronic 1998–1999 shared W-body code, Chevrolet Lumina kit (page prints the code beside "Transmission-Four Speed Auto") ⛭ GM Heritage — 1997 Chevrolet Lumina, p.70 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    M15 Transmission, automatic, 4 speed, 4T65-E, enhanced electronic 1998–2005 shared W-body code, Chevrolet Lumina kit ⛭ GM Heritage — 1998 Chevrolet Lumina, p.43 · 1999 Chevrolet Lumina, p.59 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    MN3 Transmission, automatic, 4 speed, 4T65-E 1999–2002 ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 confirmed
    MN7 Transmission, automatic, 4 speed, 4T65-E, heavy duty 1998–2004 may be Regal equipment (pairs with L67) ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    MX0 Merchandised transmission, automatic, provisions, overdrive 1998–2005 every Century list prints MXO (letter O); GM's other lists print MX0 with the same wording ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed

    Axles

    Code Description Years Models/Notes Confidence
    F83 Ratio, transaxle final drive, 3.05 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    FR2 Ratio, transaxle final drive, 2.93 1998–2004 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    FR9 Ratio, transaxle final drive, 3.29 1998–2000, 2002 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 confirmed

    Packages & Trims

    Code Description Years Models/Notes Confidence
    B2E Sales spring special package 1999–2000 ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    Y92 Merchandised package, special edition 2000 ⛭ GM factory document — 2000 buick century rpo code list, p.1 confirmed
    Z03 Appearance package, anniversary 2005 ⛭ GM factory document — 2005 buick century rpo code list, p.1 confirmed

    Equipment

    Code Description Years Models/Notes Confidence
    A31 Window, power operated, side 1998–1999 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    A90 Lock control, rear compartment lid, remote control electric release 2000–2002 ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 confirmed
    AG1 Adjuster, driver seat, power, 6 way 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    AG2 Adjuster, passenger seat, power, 6 way 1998–2004 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    AK5 Restraint system, front seat, inflatable, driver and passenger 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    AM6 Seat, front, split bench 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    AM9 Seat, rear, split folding 2000–2005 ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    AN2 Seat, child, integral 1998 ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    AN4 Restraint provisions, child 1998–2000 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    AP9 Convenience net 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    AR9 Seat, front bucket, deluxe 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    AT5 Seat, rear center, folding 1998–1999 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    AU0 Lock control, remote entry 1998–2004 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    AW6 Restraint system, seat, inflatable, driver and passenger front, inflatable driver side 2000–2005 ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    B34 Covering, front floor mats, carpeted inserts 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    B35 Covering, rear floor mats, carpeted inserts 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    BF9 Covering, front floor mats, delete 2000–2001 ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 confirmed
    BW8 Ornamentation, exterior, emblem, body, rear 1998 ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    C49 Defogger, rear window, electric 1998–2000 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    C60 HVAC system, air conditioner, front, manual controls 1998 ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    C79 Interior lamp, roof rail, courtesy and single reading 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    CF5 Roof, sun glass, sliding, electric 1998–2004 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    CJ2 HVAC system, air conditioner, front, automatic temperature control, auxiliary temperature control 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    CJ3 HVAC system, air conditioner, front, manual temperature control, auxiliary temperature control 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    D06 Console, front compartment floor, armrest 1998–2003 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 confirmed
    D55 Console, front compartment, floor 2002–2003 ⛭ GM factory document — 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 confirmed
    D81 Spoiler, rear, aero wing 2000 twin list is word for word the Regal's; may be Regal equipment ⛭ GM factory document — 2000 buick century rpo code list, p.1 confirmed
    D85 Stripe, body side, lower accent 1998–2001 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 confirmed
    DA1 Armrest, rear seat, storage 1998–2002 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 confirmed
    DA5 Armrest, rear seat, center 2003–2005 ⛭ GM factory document — 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    DC4 Mirror, inside rearview, tilt, dual reading lamps 1998–1999 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    DD8 Mirror, inside rear view, light sensitive 1998–2004 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    DE5 Mirror, outside, left-hand and right-hand, remote control electric, heated, folding, color 1998, 2000–2002 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 confirmed
    DE6 Mirror, outside, left-hand and right-hand, remote control, electric, heated, color 2003–2005 ⛭ GM factory document — 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    DG7 Mirror, outside, left-hand and right-hand, remote control electric, color 1998, 2000–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    DH6 Mirror, inside sunshade, illuminated, left-hand and right-hand 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    DR2 Mirror, outside, left-hand and right-hand, remote control, electric, manual folding, heated, light sensitive, color 1999–2002 ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 confirmed
    DS2 Mirror, outside, left-hand and right-hand, remote control, electric, tinted, manual folding, color 2003–2004 ⛭ GM factory document — 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    E28 Handle, assist 1998–2004 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    FE1 Suspension system, soft ride 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    FE2 Suspension system, ride handling 1998 ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    FE3 Suspension system, sport 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    J41 Brake system, power, front disc, rear drum, cast iron 2003 ⛭ GM factory document — 2003 buick century rpo code list, p.1 confirmed
    J65 Brake system, power, front and rear disc 2003–2005 ⛭ GM factory document — 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    JL9 Brake system, power front and rear disc, antilock front and rear wheel 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    JM4 Brake system, power front disc, rear drum, cast iron, antilock front and rear wheel 1998–2003 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 confirmed
    K05 Heater, engine block 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    K11 Air filter, cowl mounted 1998–2000 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    K29 Module, powertrain control 1998–2002 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 confirmed
    K34 Cruise control, automatic, electronic 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    K68 Generator, 105 ampere 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    KA1 Heater, seat 1998–2004 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    KA7 Heater, seat, front and rear 2002 ⛭ GM factory document — 2002 buick century rpo code list, p.1 confirmed
    KG9 Generator, 140 ampere 2002 ⛭ GM factory document — 2002 buick century rpo code list, p.1 confirmed
    N05 Lock control, fuel filler cap 1998–2004 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    NK5 Steering wheel, standard 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    NP5 Steering wheel, leather-wrapped 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    NV7 Steering, power, variable effort 1998 ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    NW0 Wheel, 16 x 6.5, cast aluminum 1998–1999 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    NW9 Traction control, electronic 1998–2004 the 1999 list reads "Traction Control" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    P01 Trim discs, wheel, variation 1 2002–2003 ⛭ GM factory document — 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 confirmed
    P08 Cover, wheel, super deluxe 1999, 2002, 2004–2005 the 2004 and 2005 lists print PO8 (letter O); P08 in the 1999 and 2002 lists and in GM's other lists with the same wording ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    PG1 Wheel, 16 x 6, steel 1998–2005 the 1998–2001 and 2003–2005 lists read 16 x 6; the 2002 list reads 15 x 6, as do GM's lists for other platforms ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    PG5 Wheel, 15 x 6, aluminum, cast 2000–2005 ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    PH3 Wheel, 15 x 6, aluminum, cast, 115 mm bolt circle 2002 ⛭ GM factory document — 2002 buick century rpo code list, p.1 confirmed
    PH6 Wheel, 15 x 6, aluminum 1998–2003 the 1999 list marks it as the Century's wheel ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 confirmed
    PY0 Wheel, 16 x 6.5, aluminum 1998–2004 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    PY1 Wheel, 16 x 6.5, aluminum, chrome 2005 ⛭ GM factory document — 2005 buick century rpo code list, p.1 confirmed
    QD1 Wheel, 16 x 6.5, aluminum, styled 2000–2004 ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    QGY Tire, all, P205/70R15/N BL R/PE ST TL ALS 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    QGZ Tire, all, P205/70R15/N WS R/PE ST TL ALS 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    QNX Tire, all, P225/60R16/N BL R/PE ST TL AL2 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    QPK Tire, all, P215/70R15-97S BW R/PE ST TL ALS 1998–2004 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    QVG Tire, all, P225/60R16-97H BL R/PE ST TL AL3 2002 ⛭ GM factory document — 2002 buick century rpo code list, p.1 confirmed
    RPA Rear parking assist 2002–2004 ⛭ GM factory document — 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    T62 Lamp system, daytime running, delete 2000–2001 ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 confirmed
    T79 Lamp, fog, rear 2002 ⛭ GM factory document — 2002 buick century rpo code list, p.1 confirmed
    T84 Headlamps, right-hand rule of the road, E mark 2002 ⛭ GM factory document — 2002 buick century rpo code list, p.1 confirmed
    TL1 Grille, special 1998 ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    U03 Horn noise regulation 2002 ⛭ GM factory document — 2002 buick century rpo code list, p.1 confirmed
    U19 Speedometer, instrument cluster, kilometers and miles, kilometer odometer 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    U1P Radio, AM/FM stereo, seek/scan, CD, clock, equalizer, RDS, ETR 2004–2005 ⛭ GM factory document — 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    U1Q Radio, AM/FM stereo, seek/scan, automatic reverse music search cassette, CD, clock, equalizer, RDS, ETR 2004–2005 ⛭ GM factory document — 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    U1V Radio, AM/FM stereo, seek/scan, multi CD, clock, ETR, automatic tone 2005 ⛭ GM factory document — 2005 buick century rpo code list, p.1 confirmed
    U20 Instrument cluster, oil, coolant temperature, volts, trip odometer, tachometer, fuel data display 1998–2004 the lists are the Regal's too and name a tachometer, which Wikipedia says the Century dashboard lacked, so this may be Regal equipment ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    U2E Instrument cluster, coolant temperature, trip odometer 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    U77 Antenna, rear window radio 1998–2004 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    U85 Speaker system, 8, quad front door-mounted, shelf quad, amplifier 1999–2004 twin list is word for word the Regal's; may be Regal equipment ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    UE1 Communication system, vehicle, GPS 1 2001–2005 ⛭ GM factory document — 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    UE4 Communication system, vehicle, GPS delete 2001 the 2001 Century list reads GPS delete; GM's lists for other platforms read this code as a following distance indicator ⛭ GM factory document — 2001 buick century rpo code list, p.1 confirmed
    UH8 Cluster, instrument, coolant temperature, trip odometer, tachometer 1998–2004 the lists are the Regal's too and name a tachometer, which Wikipedia says the Century dashboard lacked, so this may be Regal equipment ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    UJ6 Indicator, low tire pressure 2002–2005 ⛭ GM factory document — 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    UK3 Control, steering wheel, accessory 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    UL0 Radio, AM/FM stereo, seek/scan, automatic reverse music search cassette, automatic tone, clock, ETR 1998–2003 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 confirmed
    UL2 European frequencies 2000–2004 ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    UM7 Radio, AM/FM stereo, seek/scan, clock, ETR 1998–2003 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 confirmed
    UN0 Radio, AM/FM stereo, seek/scan, compact disc, automatic tone, clock, ETR 1998 ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    UN6 Radio, AM/FM stereo, seek/scan, automatic reverse music search cassette, clock, ETR 1998–2003 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 confirmed
    UP0 Radio, AM/FM stereo, seek/scan, automatic reverse music search cassette, compact disc, automatic tone, clock, ETR 1998–2003 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 confirmed
    UQ3 Speaker system, performance-enhanced audio 1998–2004 twin list is word for word the Regal's; may be Regal equipment ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    US6 Antenna, fixed, painted, radio 1998–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    UV7 Antenna, windshield, rear window, radio 1999–2002 ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 confirmed
    UV8 Provisions for mobile telephone 1998 ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    UX7 Speaker system, 4, dual front door-mounted, dual extended range package shelf 1998, 2003–2005 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    VK3 License plate mounting package, front 1998–2005 plate package ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    WX9 Wiring provisions, remote CD 1998–1999 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed

    Paint

    Code Description Years Models/Notes Confidence
    03L Secondary color, exterior, Marblehead Gray Metallic 1998–2000 GM prints "(95)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    03U Primary color, exterior, Marblehead Gray Metallic 1998–1999 the 1998 list prints O3U (letter O); 03U in the 1999 list and in GM's other lists with the same wording; GM prints "(96)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    12U Primary color, exterior, Galaxy Silver Metallic 2000 GM prints "(99)" ⛭ GM factory document — 2000 buick century rpo code list, p.1 confirmed
    14A Stripe, color accent, Light Gray 1998–2000 GM prints "(91)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    14L Secondary color, exterior, Storm Gray 1998–2000 GM prints "(97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    16U Primary color, exterior, Bright White 1998–2000 GM prints "(96)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    20A Stripe, color accent, Dark Royal Blue 1998–1999 GM prints "(94)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    27U Primary color, exterior, Regal Blue 1998–2000 GM prints "(98)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    28U Primary color, exterior, Navy Blue Metallic 1998–2000 GM prints "(98)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    41U Primary color, exterior, Black 1998–2000 GM prints "(94)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    46A Stripe, color accent, Shale 2000 GM prints "(95)" ⛭ GM factory document — 2000 buick century rpo code list, p.1 confirmed
    49U Primary color, exterior, Light Sandrift Metallic 1998–2000 GM prints "(96)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    51U Primary color, exterior, Toreador Red Metallic 1998–2000 GM prints "(96)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    52U Primary color, exterior, Auburn Nightmist Metallic 1999–2000 GM prints "(99)" ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    53U Primary color, exterior, Light Toreador Red Metallic 1998–1999 GM prints "(97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    56U Primary color, exterior, Jasper Green 1998–2000 GM prints "(97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    60U Primary color, exterior, Gold Metallic 2000 GM prints "(98)" ⛭ GM factory document — 2000 buick century rpo code list, p.1 confirmed
    76A Stripe, color accent, Dark Red 1998 GM prints "(97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    83A Stripe, color accent, Light Antelope 1998–1999 GM prints "(97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    88A Stripe, color accent, Dark Briar Brown 1998–2000 GM prints "(94)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    89U Primary color, exterior, Dark Mulberry Metallic 1998 ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    99A Stripe, color accent, Dark Slate Gray 1998–2000 GM prints "(91)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    D83 Paint, monotone 1998–2000 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed

    Interior Trim

    Code Description Years Models/Notes Confidence
    142 Trim combination, leather, Light Gray 1998–2000 GM prints "(2) (94)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    143 Trim combination, leather, Light Gray 1998–2000 GM prints "(2) (92)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    14B Trim combination, cloth, Light Gray 1998–2000 GM prints "(B) (92)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    14C Trim combination, cloth, Light Gray 1998–1999 GM prints "(C) (94)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    14D Trim combination, cloth, Light Gray 1998–2000 GM prints "(D) (92)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    14I Interior trim, Very Dark Gray 1998–2000 GM prints "(I) (97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    302 Trim combination, leather, Medium Dark Adriatic Blue 1998–1999 GM prints "(2) (94)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    303 Trim combination, leather, Medium Dark Adriatic Blue 1998–1999 GM prints "(3) (94)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    30B Trim combination, cloth, Medium Dark Adriatic Blue 1998–2000 GM prints "(B) (94)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    30C Trim combination, cloth, Medium Dark Adriatic Blue 1998–1999 GM prints "(C) (94)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    30D Trim combination, cloth, Medium Dark Adriatic Blue 1998–2000 GM prints "(D) (94)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    30I Interior trim, Medium Dark Adriatic Blue 1998–2000 GM prints "(I) (94)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    512 Trim combination, leather, Toreador Red 1998 GM prints "(2) (97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    513 Trim combination, leather, Toreador Red 1998 GM prints "(3) (97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    51B Trim combination, cloth, Toreador Red 1998 GM prints "(B) (97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    51C Trim combination, cloth, Toreador Red 1998 GM prints "(C) (97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    51D Trim combination, cloth, Toreador Red 1998 GM prints "(D) (97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    51I Interior trim, Toreador Red 1998 GM prints "(97)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    522 Trim combination, leather, Light Neutral 1998–2000 GM prints "(2) (96)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    523 Trim combination, leather, Light Neutral 1998–2000 GM prints "(3) (96)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    52B Trim combination, cloth, Light Neutral 1998–2000 GM prints "(B) (96)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    52C Trim combination, cloth, Light Neutral 1998–1999 GM prints "(C) (96)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    52D Trim combination, cloth, Light Neutral 1998–2000 GM prints "(D) (96)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    52I Interior trim, Neutral 1998–2000 GM prints "(I) (92)" ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    IP2 Trim, interior design 1998 ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    IP3 Trim, interior design 1998–2001 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 confirmed
    IPD Trim, interior design 1998–2001 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 confirmed
    IQ2 Trim, interior design 1998–2001 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 confirmed
    IQB Trim, interior design 1998–2001 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 confirmed
    IQC Trim, interior design 1998–1999 ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed

    Internal / Process

    Code Description Years Models/Notes Confidence
    BAG Parts package, export 1998–2004 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    DL5 Decal, roadside service information 1998–2005 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    NB6 Emission system, California, Tier 1 1998 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 confirmed
    NB7 Emission system, California, TLEV 1998–1999 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    NC1 Emission system, California, LEV 2000–2001, 2003 internal code ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 confirmed
    NC8 Emission system, California, ULEV 2000–2001 internal code ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 confirmed
    NF2 Emission system, federal, Tier 1 1998–2000 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    NF4 Emission system, clean fuel fleet 2003–2004 internal code ⛭ GM factory document — 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    NF7 Emission system, federal, NLEV 2001, 2003 internal code ⛭ GM factory document — 2001 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 confirmed
    NF9 Emission system, general unleaded 2003–2004 internal code ⛭ GM factory document — 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    NT9 Emission system, federal, Tier 2 phase-out 2003–2004 internal code ⛭ GM factory document — 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    NU1 Emission system, California, LEV2 2004 internal code ⛭ GM factory document — 2004 buick century rpo code list, p.1 confirmed
    NU4 Emission system, California, LEV2 plus 2003–2004 internal code ⛭ GM factory document — 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    OST Plant code, Oshawa 2, Ontario, Canada 1999–2005 internal code the Oshawa plant code; lists print OST (letter O) and GM's corpus has no zero form ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    V73 Vehicle statement, USA/Canada 1999–2000, 2005 internal code ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    V78 Vehicle statement, delete 2000 internal code ⛭ GM factory document — 2000 buick century rpo code list, p.1 confirmed
    V87 Vehicle statement, Gulf States Organization 1999–2000 internal code ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    V98 Factory delivery processing 1999–2000 internal code ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    VA5 Language label, English 2005 internal code ⛭ GM factory document — 2005 buick century rpo code list, p.1 confirmed
    VC1 Label, price/fuel economy, courtesy delivery 1999–2000 internal code ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    VC4 Label, price/fuel economy, Puerto Rico and Virgin Islands 1999–2000 internal code ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    VC5 Label, shipping, except US, US possessions, or Japan 1999–2000 internal code ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    VC7 Label, price/fuel economy, Guam 1999–2000 internal code ⛭ GM factory document — 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    VG1 Protector, underhood compound, corrosion preventive, water based, clear 1998–2000 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    VG4 Protector, undervehicle compound, corrosion preventive, water based, black 1998–2000 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    VG5 Protector, gas tank compound, corrosion protective, water based, gray 1998–2000 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 confirmed
    VG8 Vehicle label, notice to buyer 1998–2000, 2005 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    VG9 Protector, wax, exterior body 1998–2002 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 confirmed
    VH9 Envelope, owner information manual 1998–2005 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed
    VR6 Hook, tie-down, shipping 1998–2004 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 · 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 confirmed
    Z49 Export, Canadian modification, mandatory base equipment 1998–1999 internal code ⛭ GM factory document — 1998 buick century rpo code list, p.1 · 1999 buick century rpo code list, p.1 confirmed
    Z49 English/French SIR warning label 2000–2005 internal code the lists change this code's meaning after 1999 ⛭ GM factory document — 2000 buick century rpo code list, p.1 · 2001 buick century rpo code list, p.1 · 2002 buick century rpo code list, p.1 · 2003 buick century rpo code list, p.1 · 2004 buick century rpo code list, p.1 · 2005 buick century rpo code list, p.1 confirmed

    Sources

    Factory documents (T1)

    Other sources

    • NICB VIN manuals docs/reference/nicb/nicb1997-gm.txt p.33 and docs/reference/nicb/nicb2005-gm.txt p.20, 21 (T4, in the repository): the Century Custom and Century Limited series behind the aliases, and the 3.1L V6 as the only Century engine; they print no RPO codes.
    • https://en.wikipedia.org/wiki/Buick_Century (T4, fetched 2026-10-07 as raw wikitext through the MediaWiki action=raw endpoint; no block): four-door sedan only, Custom and Limited trims, L82 (1997–1999) and LG8 (2000–2005) engines, 4T60-E and 4T65-E transmissions, assembly at Oshawa, last car built October 2004, and the Century dashboard without a tachometer.