Buick · 1997-2004

Regal — W-body (1997–2004)

regal · regal custom · regal limited · regal gran sport · regal ls · regal gs

200 option rows 200 RPO codes 7 model years

100% Factory-verified

✓ Factory-verified · 200
● Confirmed · 0
◑ Single-source · 0
⚠ Disputed · 0

Applicable options

Documented RPO codes

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Model year

Show internal codes (31)

Regal — W-body (1997–2004) RPO codes
Code	Option	Years	Notes & factory source	Confidence
Engines
L36	Engine, gas, 6 cylinder, 3.8 liter, multiport fuel injection, high output, V6 (ERV6 series)	1998–2004	Wikipedia gives the 3.8L L36 to the 1997–2004 Regal; the 2003 list reads sequential fuel injection; shared W-body code, Chevrolet Lumina kit (page prints the code beside the 3.8L engine) GM Heritage factory kit — 1998 Chevrolet Lumina, p.43. GM Heritage factory kit — 1999 Chevrolet Lumina, p.59. GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
L67	Engine, gas, 6 cylinder, 3.8 liter, multiport fuel injection, supercharged, V6	1998–2004	Wikipedia gives the supercharged 3.8L L67 to the 1997–2004 Regal GS; the 2003 list reads sequential fuel injection GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
Transmissions
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 factory kit — 1997 Chevrolet Lumina, p.70. GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
M15	Transmission, automatic, 4 speed, 4T65-E, enhanced electronic	1998–2004	shared W-body code, Chevrolet Lumina kit GM Heritage factory kit — 1998 Chevrolet Lumina, p.43. GM Heritage factory kit — 1999 Chevrolet Lumina, p.59. GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
MN3	Transmission, automatic, 4 speed, 4T65-E	1999–2002	GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
MN7	Transmission, automatic, 4 speed, 4T65-E, heavy duty	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
MX0	Merchandised transmission, automatic, provisions, overdrive	1998–2004	every Regal list prints MXO (letter O); GM's other lists print MX0 with the same wording GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
Axles
F83	Ratio, transaxle final drive, 3.05	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
FR2	Ratio, transaxle final drive, 2.93	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
FR9	Ratio, transaxle final drive, 3.29	1998–2000, 2002	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
Packages & Trims
B2E	Sales spring special package	1999–2000	GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
Y92	Merchandised package, special edition	2000	GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
Equipment
A31	Window, power operated, side	1998–1999	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
A90	Lock control, rear compartment lid, remote control electric release	2000–2002	GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
AG1	Adjuster, driver seat, power, 6 way	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
AG2	Adjuster, passenger seat, power, 6 way	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
AK5	Restraint system, front seat, inflatable, driver and passenger	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
AM6	Seat, front, split bench	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
AM9	Seat, rear, split folding	2000–2004	GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
AN2	Seat, child, integral	1998	GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
AN4	Restraint provisions, child	1998–2000	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
AP9	Convenience net	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
AR9	Seat, front bucket, deluxe	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
AT5	Seat, rear center, folding	1998–1999	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
AU0	Lock control, remote entry	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
AW6	Restraint system, seat, inflatable, driver and passenger front, inflatable driver side	2000–2004	GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
B34	Covering, front floor mats, carpeted inserts	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
B35	Covering, rear floor mats, carpeted inserts	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
BF9	Covering, front floor mats, delete	2000–2001	GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1.	Factory-verified
BW8	Ornamentation, exterior, emblem, body, rear	1998	GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
C49	Defogger, rear window, electric	1998–2000	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
C60	HVAC system, air conditioner, front, manual controls	1998	GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
C79	Interior lamp, roof rail, courtesy and single reading	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
CF5	Roof, sun glass, sliding, electric	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
CJ2	HVAC system, air conditioner, front, automatic temperature control, auxiliary temperature control	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
CJ3	HVAC system, air conditioner, front, manual temperature control, auxiliary temperature control	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
D06	Console, front compartment floor, armrest	1998–2003	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1.	Factory-verified
D55	Console, front compartment, floor	2002–2003	GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1.	Factory-verified
D81	Spoiler, rear, aero wing	2000	GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
D85	Stripe, body side, lower accent	1998–2001	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1.	Factory-verified
DA1	Armrest, rear seat, storage	1998–2002	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
DA5	Armrest, rear seat, center	2003–2004	GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
DC4	Mirror, inside rearview, tilt, dual reading lamps	1998–1999	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
DD8	Mirror, inside rear view, light sensitive	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
DE5	Mirror, outside, left-hand and right-hand, remote control electric, heated, folding, color	1998, 2000–2002	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
DE6	Mirror, outside, left-hand and right-hand, remote control, electric, heated, color	2003–2004	GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
DG7	Mirror, outside, left-hand and right-hand, remote control electric, color	1998, 2000–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
DH6	Mirror, inside sunshade, illuminated, left-hand and right-hand	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
DR2	Mirror, outside, left-hand and right-hand, remote control, electric, manual folding, heated, light sensitive, color	1999–2002	GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
DS2	Mirror, outside, left-hand and right-hand, remote control, electric, tinted, manual folding, color	2003–2004	GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
E28	Handle, assist	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
FE1	Suspension system, soft ride	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
FE2	Suspension system, ride handling	1998	GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
FE3	Suspension system, sport	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
J41	Brake system, power, front disc, rear drum, cast iron	2003	GM factory document — 2003 buick regal rpo code list, p.1.	Factory-verified
J65	Brake system, power, front and rear disc	2003–2004	GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
JL9	Brake system, power front and rear disc, antilock front and rear wheel	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
JM4	Brake system, power front disc, rear drum, cast iron, antilock front and rear wheel	1998–2003	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1.	Factory-verified
K05	Heater, engine block	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
K11	Air filter, cowl mounted	1998–2000	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
K29	Module, powertrain control	1998–2002	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
K34	Cruise control, automatic, electronic	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
K68	Generator, 105 ampere	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
KA1	Heater, seat	1998–2004	Wikipedia lists heated leather seats for the Regal GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
KA7	Heater, seat, front and rear	2002	GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
KG9	Generator, 140 ampere	2002	GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
N05	Lock control, fuel filler cap	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
NK5	Steering wheel, standard	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
NP5	Steering wheel, leather-wrapped	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
NV7	Steering, power, variable effort	1998	GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
NW0	Wheel, 16 x 6.5, cast aluminum	1998–1999	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
NW9	Traction control, electronic	1998–2004	the 1999 list reads "Traction Control" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
P01	Trim discs, wheel, variation 1	2002–2003	GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1.	Factory-verified
P08	Cover, wheel, super deluxe	1999, 2002, 2004	the 2004 list prints 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 regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
PG1	Wheel, 16 x 6, steel	1998–2004	the 1998–2001 and 2003–2004 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 regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
PG5	Wheel, 15 x 6, aluminum, cast	2000–2004	GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
PH3	Wheel, 15 x 6, aluminum, cast, 115 mm bolt circle	2002	GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
PW8	Wheel, 15 x 6, aluminum	1999–2004	the 1999 list prints this code as the Regal's wheel; the 2000–2004 lists print it without a model GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
PY0	Wheel, 16 x 6.5, aluminum	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
QD1	Wheel, 16 x 6.5, aluminum, styled	2000–2004	GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
QGY	Tire, all, P205/70R15/N BL R/PE ST TL ALS	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
QGZ	Tire, all, P205/70R15/N WS R/PE ST TL ALS	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
QNX	Tire, all, P225/60R16/N BL R/PE ST TL AL2	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
QPK	Tire, all, P215/70R15-97S BW R/PE ST TL ALS	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
QVG	Tire, all, P225/60R16-97H BL R/PE ST TL AL3	2002	GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
RPA	Rear parking assist	2002–2004	GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
T62	Lamp system, daytime running, delete	2000–2001	GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1.	Factory-verified
T79	Lamp, fog, rear	2002	GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
T84	Headlamps, right-hand rule of the road, E mark	2002	GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
TL1	Grille, special	1998	GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
U03	Horn noise regulation	2002	GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
U19	Speedometer, instrument cluster, kilometers and miles, kilometer odometer	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
U1P	Radio, AM/FM stereo, seek/scan, CD, clock, equalizer, RDS, ETR	2004	GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
U1Q	Radio, AM/FM stereo, seek/scan, automatic reverse music search cassette, CD, clock, equalizer, RDS, ETR	2004	GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
U20	Instrument cluster, oil, coolant temperature, volts, trip odometer, tachometer, fuel data display	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
U2E	Instrument cluster, coolant temperature, trip odometer	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
U77	Antenna, rear window radio	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
U85	Speaker system, 8, quad front door-mounted, shelf quad, amplifier	1999–2004	Wikipedia lists an 8-speaker sound system for the Regal GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
UE1	Communication system, vehicle, GPS 1	2001–2004	GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
UE4	Communication system, vehicle, GPS delete	2001	the 2001 list reads GPS delete; GM's lists for other platforms read this code as a following distance indicator GM factory document — 2001 buick regal rpo code list, p.1.	Factory-verified
UH8	Cluster, instrument, coolant temperature, trip odometer, tachometer	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
UJ6	Indicator, low tire pressure	2002–2004	GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
UK3	Control, steering wheel, accessory	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
UL0	Radio, AM/FM stereo, seek/scan, automatic reverse music search cassette, automatic tone, clock, ETR	1998–2003	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1.	Factory-verified
UL2	European frequencies	2000–2004	GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
UM7	Radio, AM/FM stereo, seek/scan, clock, ETR	1998–2003	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1.	Factory-verified
UN0	Radio, AM/FM stereo, seek/scan, compact disc, automatic tone, clock, ETR	1998	GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
UN6	Radio, AM/FM stereo, seek/scan, automatic reverse music search cassette, clock, ETR	1998–2003	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1.	Factory-verified
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 regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1.	Factory-verified
UQ3	Speaker system, performance-enhanced audio	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
US6	Antenna, fixed, painted, radio	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
UV7	Antenna, windshield, rear window, radio	1999–2002	GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
UV8	Provisions for mobile telephone	1998	GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
UX7	Speaker system, 4, dual front door-mounted, dual extended range package shelf	1998, 2003–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
VK3	License plate mounting package, front	1998–2004	plate package GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
WX9	Wiring provisions, remote CD	1998–1999	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
Paint
03L	Secondary color, exterior, Marblehead Gray Metallic	1998–2000	GM prints "(95)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
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 regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
12U	Primary color, exterior, Galaxy Silver Metallic	2000	GM prints "(99)" GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
14A	Stripe, color accent, Light Gray	1998–2000	GM prints "(91)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
14L	Secondary color, exterior, Storm Gray	1998–2000	GM prints "(97)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
16U	Primary color, exterior, Bright White	1998–2000	GM prints "(96)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
20A	Stripe, color accent, Dark Royal Blue	1998–1999	GM prints "(94)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
27U	Primary color, exterior, Regal Blue	1998–2000	GM prints "(98)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
28U	Primary color, exterior, Navy Blue Metallic	1998–2000	GM prints "(98)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
41U	Primary color, exterior, Black	1998–2000	GM prints "(94)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
46A	Stripe, color accent, Shale	2000	GM prints "(95)" GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
49U	Primary color, exterior, Light Sandrift Metallic	1998–2000	GM prints "(96)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
51U	Primary color, exterior, Toreador Red Metallic	1998–2000	GM prints "(96)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
52U	Primary color, exterior, Auburn Nightmist Metallic	1999–2000	GM prints "(99)" GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
53U	Primary color, exterior, Light Toreador Red Metallic	1998–1999	GM prints "(97)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
56U	Primary color, exterior, Jasper Green	1998–2000	GM prints "(97)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
60U	Primary color, exterior, Gold Metallic	2000	GM prints "(98)" GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
76A	Stripe, color accent, Dark Red	1998	GM prints "(97)" GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
83A	Stripe, color accent, Light Antelope	1998–1999	GM prints "(97)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
88A	Stripe, color accent, Dark Briar Brown	1998–2000	GM prints "(94)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
89U	Primary color, exterior, Dark Mulberry Metallic	1998	GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
99A	Stripe, color accent, Dark Slate Gray	1998–2000	GM prints "(91)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
D83	Paint, monotone	1998–2000	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
Interior Trim
142	Trim combination, leather, Light Gray	1998–2000	GM prints "(2) (94)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
143	Trim combination, leather, Light Gray	1998–2000	GM prints "(2) (92)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
14B	Trim combination, cloth, Light Gray	1998–2000	GM prints "(B) (92)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
14C	Trim combination, cloth, Light Gray	1998–1999	GM prints "(C) (94)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
14D	Trim combination, cloth, Light Gray	1998–2000	GM prints "(D) (92)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
14I	Interior trim, Very Dark Gray	1998–2000	GM prints "(I) (97)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
302	Trim combination, leather, Medium Dark Adriatic Blue	1998–1999	GM prints "(2) (94)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
303	Trim combination, leather, Medium Dark Adriatic Blue	1998–1999	GM prints "(3) (94)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
30B	Trim combination, cloth, Medium Dark Adriatic Blue	1998–2000	GM prints "(B) (94)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
30C	Trim combination, cloth, Medium Dark Adriatic Blue	1998–1999	GM prints "(C) (94)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
30D	Trim combination, cloth, Medium Dark Adriatic Blue	1998–2000	GM prints "(D) (94)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
30I	Interior trim, Medium Dark Adriatic Blue	1998–2000	GM prints "(I) (94)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
512	Trim combination, leather, Toreador Red	1998	GM prints "(2) (97)" GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
513	Trim combination, leather, Toreador Red	1998	GM prints "(3) (97)" GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
51B	Trim combination, cloth, Toreador Red	1998	GM prints "(B) (97)" GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
51C	Trim combination, cloth, Toreador Red	1998	GM prints "(C) (97)" GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
51D	Trim combination, cloth, Toreador Red	1998	GM prints "(D) (97)" GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
51I	Interior trim, Toreador Red	1998	GM prints "(97)" GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
522	Trim combination, leather, Light Neutral	1998–2000	GM prints "(2) (96)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
523	Trim combination, leather, Light Neutral	1998–2000	GM prints "(3) (96)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
52B	Trim combination, cloth, Light Neutral	1998–2000	GM prints "(B) (96)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
52C	Trim combination, cloth, Light Neutral	1998–1999	GM prints "(C) (96)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
52D	Trim combination, cloth, Light Neutral	1998–2000	GM prints "(D) (96)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
52I	Interior trim, Neutral	1998–2000	GM prints "(I) (92)" GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
IP2	Trim, interior design	1998	GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
IP3	Trim, interior design	1998–2001	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1.	Factory-verified
IPD	Trim, interior design	1998–2001	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1.	Factory-verified
IQ2	Trim, interior design	1998–2001	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1.	Factory-verified
IQB	Trim, interior design	1998–2001	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1.	Factory-verified
IQC	Trim, interior design	1998–1999	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
Internal / Process
BAG internal	Parts package, export	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
DL5 internal	Decal, roadside service information	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
NB6 internal	Emission system, California, Tier 1	1998	GM factory document — 1998 buick regal rpo code list, p.1.	Factory-verified
NB7 internal	Emission system, California, TLEV	1998–1999	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
NC1 internal	Emission system, California, LEV	2000–2001, 2003	GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1.	Factory-verified
NC8 internal	Emission system, California, ULEV	2000–2001	GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1.	Factory-verified
NF2 internal	Emission system, federal, Tier 1	1998–2000	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
NF4 internal	Emission system, clean fuel fleet	2003–2004	GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
NF7 internal	Emission system, federal, NLEV	2001, 2003	GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1.	Factory-verified
NF9 internal	Emission system, general unleaded	2003–2004	GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
NT9 internal	Emission system, federal, Tier 2 phase-out	2003–2004	GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
NU1 internal	Emission system, California, LEV2	2004	GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
NU4 internal	Emission system, California, LEV2 plus	2003–2004	GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
OST internal	Plant code, Oshawa 2, Ontario, Canada	1999–2004	the Oshawa plant code; lists print OST (letter O) and GM's corpus has no zero form GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
V73 internal	Vehicle statement, USA/Canada	1999–2000	GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
V78 internal	Vehicle statement, delete	2000	GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
V87 internal	Vehicle statement, Gulf States Organization	1999–2000	GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
V98 internal	Factory delivery processing	1999–2000	GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
VC1 internal	Label, price/fuel economy, courtesy delivery	1999–2000	GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
VC4 internal	Label, price/fuel economy, Puerto Rico and Virgin Islands	1999–2000	GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
VC5 internal	Label, shipping, except US, US possessions, or Japan	1999–2000	GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
VC7 internal	Label, price/fuel economy, Guam	1999–2000	GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
VG1 internal	Protector, underhood compound, corrosion preventive, water based, clear	1998–2000	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
VG4 internal	Protector, undervehicle compound, corrosion preventive, water based, black	1998–2000	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
VG5 internal	Protector, gas tank compound, corrosion protective, water based, gray	1998–2000	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
VG8 internal	Vehicle label, notice to buyer	1998–2000	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1.	Factory-verified
VG9 internal	Protector, wax, exterior body	1998–2002	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1.	Factory-verified
VH9 internal	Envelope, owner information manual	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
VR6 internal	Hook, tie-down, shipping	1998–2004	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1. GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified
Z49 internal	Export, Canadian modification, mandatory base equipment	1998–1999	GM factory document — 1998 buick regal rpo code list, p.1. GM factory document — 1999 buick regal rpo code list, p.1.	Factory-verified
Z49 internal	English/French SIR warning label	2000–2004	the lists change this code's meaning after 1999 GM factory document — 2000 buick regal rpo code list, p.1. GM factory document — 2001 buick regal rpo code list, p.1. GM factory document — 2002 buick regal rpo code list, p.1. GM factory document — 2003 buick regal rpo code list, p.1. GM factory document — 2004 buick regal rpo code list, p.1.	Factory-verified

Source document: buick/regal-w-body-1997.md. Rows marked — record an option the factory offered whose RPO code is not documented in the consulted sources.