GM RPO Code Database

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24,366

codes on file

51,776

documented meanings

1973–2026

model years

Type a code, or describe the option in words. Every entry says where the meaning came from and which years we hold it for, because an RPO code can mean different things in different eras and a list that hides that is worse than no list.

Code or description

Model year

Sourcing Any From a GM document Corroborated GM option master, dated General reference Provisional

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The full list, A to Z

Showing 101–200 of 741 codes beginning with G. One meaning shown per code — the best-sourced one we hold. Search above for the rest.

Code	Meaning	Years	Sourcing
G6P	Primary Color Exterior, Jungle Fever - Bright Green(423y)	—	Reference
G6R	Primary Color Exterior, Carrageen, Mica (182x)	—	Reference
G6S	Primary Color Exterior, Olive Tree Met (183x)	—	Reference
G6V	Primary Color Exterior, Orange Rock (357x)	—	Reference
G72	AXLE REAR, 2.14 RATIO	—	Provisional
G73	P, RAX, M, AXLE REAR, HEAVY DUTY	1983	GM sourced
G74	HEAVY DUTY SUSPENSION	—	Provisional
G75	P, GVW, M, GVW RATING, 4,550 LBS, 823	—	GM sourced
G76	P, GVW, M, GVW RATING, 4,635 LBS, 905	—	Provisional
G77	P, GVW, M, GVW RATING, 4,820 LBS, 905	—	Provisional
G78	P, GVW, M, GVW RATING, 4,512 LBS, 911	—	Provisional
G79	P, GVW, M, GVW RATING, 24,000 LB (10,886 KG), 1207	—	GM sourced
G7C	Red Hot	2023	GM sourced
G7D	Primary Color Exterior, Lemon Peel Solid (131x)	—	Reference
G7E	Primary Color Exterior, Caught Red Handed Tintcoat (132x)	—	Reference
G7F	Primary Color Exterior, Ladies & Magenta Man Met	—	Reference
G7H	Primary Color Exterior, Blue MY Mind Tintcoat (135x)	—	Reference
G7J	Primary Color Exterior, Unripened Green Met (136x)	—	Reference
G7K	Equipment Antenna, Cable And Groundplate	—	Reference
G7L	Equipment Air Deflector - Roof Rack	—	Reference
G7P	Primary Color Exterior, Tin Roof Rusted Met (138x)	—	Reference
G7Q	Primary Color Exterior, Son OF A Gun Gray Met (139x)	—	Reference
G7T	Primary Color Exterior, Baroque Red Met (142x)	—	Reference
G7U	Primary Color Exterior, Plum Berry Met (143x)	—	Reference
G7W	Primary Color Exterior, Son OF A Gun Gray Met-low Gloss (145x)	—	Reference
G7X	Primary Color Exterior, Blue A GO GO (113v)	—	Reference
G80	automatic locking rear differential this code has more than one documented meaning — filter by year	2026	GM sourced
G81	P, AXLE POSITRACTION, FULL LOCKING DIFFERENTIAL, ELECTRONIC, DRIVER SELECT, 20313	—	GM sourced
G82	P, RAT, M, RATIO, TRANSAXLE FINAL DRIVE 4.33, 20122 E, 0	—	Provisional
G83	Gear,ring 8.75 Inch	—	Reference
G84	P, RAX, M, AXLE REAR, 3.70 RATIO this code has more than one documented meaning — filter by year	1997	GM sourced
G85	P, RAX, M, AXLE REAR, LIMITED SLIP, VAR 1 this code has more than one documented meaning — filter by year	1998	GM sourced
G86	Differential, mechanical limited-slip	2026	GM sourced
G87	P, RING GEAR, 8.50 INCH	1984	GM sourced
G88	Ornamentation Intr, I/p, Id, '888'	—	Reference
G89	P, RAT, M, RATIO, TRANSAXLE FINAL DRIVE 4.13, 20122 E, 0	—	GM sourced
G8F	Primary Color Exterior, Sunset Orange Met (633h)	—	Reference
G8G	Primary Color Exterior, Arctic White (9567)	—	Reference
G8H	Primary Color Exterior, Green O'clock Metallic (414x)	—	Reference
G90	P, RAX, M, AXLE REAR, 3.15 RATIO	1984	GM sourced
G91	P, RAX, M, AXLE REAR, 6.83 RATIO	1986	GM sourced
G92	P, AXLE REAR RATIO, PERFORMANCE	1990	GM sourced
G93	Differential, driver-selectable full-locking front	2026	GM sourced
G94	Differential, driver-selectable full-locking rear	2026	GM sourced
G95	P, AXLE REAR RATIO, ECONOMY this code has more than one documented meaning — filter by year	1990	GM sourced
G96	Differential, electronic limited-slip	2026	GM sourced
G97	P, RAX, M, AXLE REAR, NO RATIO (TO BE USED WITH ELECTRIC VEHICLE)	1998	GM sourced
G98	P, SEAL, RR AXLE, OIL, STEMCO this code has more than one documented meaning — filter by year	1984	GM sourced
G9K	Satin Steel Metallic	2022	GM sourced
G9Y	GVWR, 14,000 lbs. (6350 kg)	2026	GM sourced
GA0	P, FIN, R, FLEET INCENTIVE, WHIRLPOOL CORP. (B/C/J/N/S/U/V/W-TRK CKGST), 21014	—	Provisional
GA1	P, FIN, R, FLEET INCENTIVE, THE ALDERWOODS GROUP (C/H/K/U/W-TRK CKGML), 20422	—	Provisional
GA2	P, FIN, R, FLEET INCENTIVE, ECHO STAR/DISH INSTALLATION NETWORK (TRK CKG), 20912	—	Provisional
GA3	P, FIN, R, FLEET INCENTIVE, ALYESKA PIPELINE COMPANY (TRK CKGMLST), 10723	—	Provisional
GA4	P, FIN, R, FLEET INCENTIVE, PERFORMANCE CONTRACTING GROUP (H/K/U/W-TRK CKGST), 20422	—	Provisional
GA5	P, FIN, R, FLEET INCENTIVE, HENKEL SURFACE TECH. (C/H/K/W)	1999	GM sourced
GA6	P, FIN, R, FLEET INCENTIVE, ALASKA PACIFIC TRANSPORTATION (C/H/K-TRK CKGML), 20801	—	Provisional
GA7	P, FIN, R, FLEET INCENTIVE, 1-800-CONNECT (-TRK CKGMLST), 20917	—	Provisional
GA8	P, FIN, R, FLEET INCENTIVE, AIR COMFORT, INC/UNIFIED GROUP (W-TRK CKGML), 20801	—	Provisional
GA9	P, FIN, R, FLEET INCENTIVE, HOOD CORPORATION (TRK CK), 11108	—	Provisional
GAG	Primary Color Exterior, Carbon Grey Met	—	Reference
GAJ	Appearance Package Chevrolet Premium Package	—	Reference
GAL	Primary Color Exterior, Technical Grey, Met.2	—	Reference
GAM	P, VEHICLE, GOVERNMENT (G.S.A. SALES)	1991	GM sourced
GAN	Silver Ice Metallic	2021	GM sourced
GAO	Northsky Blue Metallic	2023	GM sourced
GAP	Primary Color Exterior, Imperial Blue Met (g)	—	Reference
GAQ	Primary Color Exterior, Red Jewel Tintcoat (g)	—	Reference
GAR	Primary Color Exterior, Carbon Flash Met (g)	—	Reference
GAS	Primary Color Exterior, Techno Gray Met (g)	—	Reference
GAT	Appearance Package GMC 'all Terrain'	—	Reference
GAU	Primary Color Exterior, Transition Blue Met (g)	—	Reference
GAV	Primary Color Exterior, Urbane Moss Met (g)	—	Reference
GAX	Primary Color Exterior, Antique Bronze Met (g)	—	Reference
GAY	Primary Color Exterior, Myth Green, Mica (g)	—	Reference
GAZ	Summit White	2026	GM sourced
GB0	P, FIN, R, FLEET INCENTIVE, FINISH MASTER AUTO & IND. PAINT (U-TRK CKGMLST), 10730 this code has more than one documented meaning — filter by year	—	GM sourced
GB1	P, FIN, R, FLEET INCENTIVE, ANDERSON WINDOWS, INC. (U/W-TRK JST), 20801	—	Provisional
GB2	P, FIN, R, FLEET INCENTIVE, COMFORT SYSTEMS (N/U/W-TRK CKGMLST), 10517	—	Provisional
GB3	Fleet Incentive Information Communication Services (trk Gml)	—	Reference
GB4	P, FIN, R, FLEET INCENTIVE, INDEPENDENT CONTRACTORS OF AIRBORNE EXPRESS (TRK GML)	1999	GM sourced
GB5	P, FIN, R, FLEET INCENTIVE, FEDERAL EXPRESS (J/N/W - TRK CKGMLST)	1999	GM sourced
GB6	P, FIN, R, FLEET INCENTIVE, PACE INTERNATIONAL UNION (H/U/W), 21030	—	GM sourced
GB7	P, FIN, R, FLEET INCENTIVE, J.C. EHRLICH CO. (N/S/W-TRK CKGST), 11108	—	Provisional
GB8	P, FIN, R, FLEET INCENTIVE, EXCELLENCE ALLIANCE, INC. (U/W-TRK CKGMLST), 11001	—	Provisional
GB9	P, LABEL, LIMITED, CONSIGNMENT-DELETE	1999	Provisional
GBA	Black	2026	GM sourced
GBB	Primary Color Exterior, LT Tarnished Silver Met (g)	—	Reference
GBC	Primary Color Exterior, Graystone Met (g)	—	Reference
GBD	Primary Color Exterior, Aqua Blue Met (g)	—	Reference
GBE	Primary Color Exterior, Crystal Claret Tintcoat (g)	—	Reference
GBF	Primary Color Exterior, Pannacotta, Mica (g)	—	Reference
GBG	Primary Color Exterior, Black Sapphire, Mica(g)	—	Reference
GBH	Primary Color Exterior Power Red(g)	—	Reference
GBI	Primary Color Exterior, Metro, Met (g)	—	Reference
GBJ	Primary Color Exterior, Silver Lightning, Met (g)	—	Reference
GBK	Primary Color Exterior, Ultra Blue, Mica (g)	—	Reference
GBL	Primary Color Exterior, Pommegranate Red, Mica(g)	—	Reference
GBM	Primary Color Exterior, Arden Blue, Mica (g)	—	Reference
GBN	Primary Color Exterior, White Diamond Tricoat (g)	—	Reference

Using the master list

This is the full GM RPO code list we hold — every Regular Production Option code in the database, searchable by code or by description and filterable to a single model year. Most RPO lists on the internet run to a couple of hundred codes copied from one service manual. This one holds 24,366, and tells you where each meaning came from.

What an RPO code is

RPO stands for Regular Production Option. Every piece of factory equipment on a GM vehicle carries a three-character code, and the ones fitted to your truck are printed on the Service Parts Identification label in the glove box or on the door jamb. G80 is a locking differential, Z71 is an off-road suspension package, K05 is a block heater.

They matter because they are what the factory actually built, not what a listing claims. If you are buying a truck, the label settles the argument. If you are ordering parts, the axle and transmission codes decide which part fits.

Why the same code means different things

GM has reused these codes for decades and across every division. A code that means one thing on a 1978 pickup can mean something unrelated on a 2015 SUV, and plenty of entries in circulation come from bulk listings with no year and no document behind them.

So every entry here is labelled with where it came from. GM sourced means we hold an actual GM document for it. GM dated means it comes from the option master with a date attached. Reference means it is in general circulation with nothing dated behind it — still useful, but treat it as a lead rather than a fact. Filtering by your model year is the single best way to get an answer you can rely on.

Read the codes off your own label

If you have the sticker in front of you, the RPO decoder will read a photo of it and decode every code at once, checked against your model year.

FullSizeChevy.com is not affiliated with, endorsed by, or sponsored by General Motors. Chevrolet, GMC, Cadillac, Silverado, Sierra and related marks are trademarks of General Motors LLC and are used here only to identify applicable vehicles. RPO meanings vary by model year, platform and configuration — verify against your own label before buying parts.