GM RPO Code Database

Search the code list

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 501–600 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
GOY	Primary Color Exterior, Moulan Rouge Red Met (893t)	—	Reference
GOZ	Primary Color Exterior, Daydream Beige Met	—	Reference
GP0	P, SSR, M, SUSPENSION REAR, 23,000 LB (10,430 KG), TAPERED LEAF, 607	—	GM sourced
GP1	P, SSR, M, SUSPENSION REAR, 23,500 LB, (10,660 KG), MULTILEAF this code has more than one documented meaning — filter by year	1998	GM sourced
GP2	P, SSR, M, SUSPENSION REAR, 10,000 LB	1998	GM sourced
GP3	P, SSR, M, SUSPENSION REAR, 10,500 LB	1998	GM sourced
GP4	P, SSR, M, SUSPENSION REAR, 11,000 LB this code has more than one documented meaning — filter by year	1998	GM sourced
GP5	P, SSR, M, SUSPENSION REAR, 11,800 LB this code has more than one documented meaning — filter by year	1998	GM sourced
GP6	P, SSR, M, SUSPENSION REAR, 5,000 KG, TAPERED LEAF this code has more than one documented meaning — filter by year	1998	GM sourced
GP7	C, SSR, M, SUSPENSION REAR, 6,120 KG, TAPERED LEAF (SEO) this code has more than one documented meaning — filter by year	1998	GM sourced
GP8	P, SSR, M, SUSPENSION REAR, 27,000 LB (12,250 KG), MULTILEAF, 607	—	GM sourced
GP9	P, SSR, M, SUSPENSION REAR, 17,850 LB, TAPERED LEAF this code has more than one documented meaning — filter by year	1998	GM sourced
GPB	C, SSR, M, SUSPENSION REAR, 40,000 LB, HENDRICKSON, HAS400, AIR this code has more than one documented meaning — filter by year	1998	GM sourced
GPD	Suspension Rear 40,000 Lb, Hend, Has 400, Air Suspension	—	Reference
GPG	P, VEHICLE, LOW PROFILE PACKAGE this code has more than one documented meaning — filter by year	1991	GM sourced
GPH	C, HEIGHT ADJUSTMENT, SUSPENSION, RR MODIFIED this code has more than one documented meaning — filter by year	1989	GM sourced
GPJ	P, VEHICLE STORAGE, SHIP CODE (MORAINE)	1998	GM sourced
GPK	Family Code, Window Pkg	1989	GM dated
GPL	P, SSR, M, SUSPENSION REAR, 40,000 LB, HEND RS400, RUBBER BUSHING, 52 IN BEAM this code has more than one documented meaning — filter by year	1999	GM sourced
GPN	C, VEHICLE, GARBAGE PACKER this code has more than one documented meaning — filter by year	1998	GM sourced
GPO	C, VEHICLE, MOTOR HOME	1998	GM sourced
GPR	P, SSR, M, SUSPENSION REAR, 40,000 LB (18,144 KG), HENDRICKSON RTE400,, 52 IN BEAM, W/BRONZE CENTER BUSHING, 607	—	GM sourced
GQ0	P, SSR, M, SUSPENSION REAR, 15,000 LB (6,800 KG), TAPERED LEAF, 612	—	GM sourced
GQ1	P, AXLE, STD RATIO this code has more than one documented meaning — filter by year	1991	GM sourced
GQ2	P, SSR, M, SUSPENSION REAR, 15,000 LB (6,804 KG), 607	—	GM sourced
GQ3	P, SSR, M, SUSPENSION REAR, 31,000 LB, MULTILEAF this code has more than one documented meaning — filter by year	1998	GM sourced
GQ4	P, SSR, M, SUSPENSION REAR, 12,000 LB	1998	GM sourced
GQ5	P, SSR, M, SUSPENSION REAR, 13,500 LB	1998	GM sourced
GQ7	P, SSR, M, SUSPENSION REAR, 14,500 LB	1998	GM sourced
GQ9	P, SSR, M, SUSPENSION REAR, 44,000 LB, HEND RT440, BRZ BUSH, 54 IN BEAM this code has more than one documented meaning — filter by year	1998	GM sourced
GQB	P, PCT, R, THIRD POSITION, PROP HANGER, HEIGHT A this code has more than one documented meaning — filter by year	1988	GM sourced
GQC	P, PCT, R, THIRD POSITION, PROP HANGER, HEIGHT B this code has more than one documented meaning — filter by year	1988	GM sourced
GQD	P, PCT, R, THIRD POSITION, PROP HANGER, HEIGHT C this code has more than one documented meaning — filter by year	1988	GM sourced
GQE	P, PCT, R, THIRD POSITION, PROP HANGER, HEIGHT D this code has more than one documented meaning — filter by year	1994	GM sourced
GQF	P, PCT, R, THIRD POSITION, PROP HANGER, HEIGHT E this code has more than one documented meaning — filter by year	1994	GM sourced
GQG	Third Position Prop Hanger, Angle 95.75, Height A	—	Reference
GQH	P, INJECTOR, ALCOHOL this code has more than one documented meaning — filter by year	1991	GM sourced
GQI	Third Position Prop Hanger, Angle 95.75, Height C	—	Reference
GQJ	Primary Color Exterior, Grand Canyon Brown Met (894t)	—	Reference
GQK	Primary Color Exterior, Gunsmoke Grey Met	—	Reference
GQL	Primary Color Exterior, Luscious Kiss Pink Met	—	Reference
GQM	Primary Color Exterior, Boracay Blue Met (895t)	—	Reference
GQN	Primary Color Exterior, Alpine White	—	Reference
GQP	Primary Color Exterior, Tornade Red Met	—	Reference
GQQ	Primary Color Exterior, Royal Grey Met	—	Reference
GQR	Primary Color Exterior, Black Sapphire Met	—	Reference
GQS	Primary Color Exterior, Sterling Silver Met	—	Reference
GQV	Primary Color Exterior, Flame Red	—	Reference
GQW	Primary Color Exterior, Urban Grey	—	Reference
GQX	Primary Color Exterior, White	—	Reference
GR1	P, SSR, M, SUSPENSION REAR, 5,300 LB, STANDARD HEIGHT this code has more than one documented meaning — filter by year	1998	GM sourced
GR2	P, SSR, M, SUSPENSION REAR, 11,000 LB (4,990 KG), TAPERED LEAF, 607	—	GM sourced
GR3	Suspension Rear 11000 LB Multi Leaf	—	Reference
GR4	P, SSR, M, SUSPENSION REAR, 13,500 LB, MULTILEAF this code has more than one documented meaning — filter by year	1998	GM sourced
GR5	P, SSR, M, SUSPENSION REAR, 4,535 KG, (10,000 LB), TAPERED LEAF	1998	GM sourced
GR6	P, FIN, R, FLEET INCENTIVE, HOVENSA LLC (J-TRK CKMLST)	1999	GM sourced
GR9	P, SSR, M, SUSPENSION REAR, 21,000 LB (9,525 KG), TAPERED LEAF, 607	—	GM sourced
GRA	P, PLT, R, PLANT CODE, GRAVATAI, BRAZIL	1998	GM sourced
GRB	P, TRM, M, TRIM COMBINATION, CLOTH, GENERIC GRAY, VAR 1, 10308 E, 1, 1, A	—	GM sourced
GRC	P, TRM, M, TRIM COMBINATION, CLOTH, GENERIC GRAY, VAR 2, 10308 E, 1, 1, A	—	GM sourced
GRD	P, TRM, M, TRIM COMBINATION, CLOTH, GENERIC GRAY, VAR 3, 10308 E, 1, 1, A	—	GM sourced
GRE	P, TRM, M, TRIM COMBINATION, LEATHER, GENERIC GRAY, VAR 1, 10308 E, 1, 1, A	—	GM sourced
GRF	P, TRM, M, TRIM COMBINATION, LEATHER, GENERIC GRAY, VAR 2, 10308 E, 1, 1, A	—	GM sourced
GRG	P, TRM, M, TRIM COMBINATION, LEATHER, GENERIC GRAY, VAR 3, 10308 E, 1, 1, A	—	GM sourced
GRH	P, TRM, M, TRIM COMBINATION, LEATHER, GENERIC GRAY, VAR 4, 10308 E, 1, 1, A	—	GM sourced
GRI	P, CCM, M, INTERIOR TRIM, GENERIC GRAY, 10308 E, 1, 1, A	—	GM sourced
GRL	Family Code, Grille	1991	GM dated
GRM	Primary Color Exterior, Cosmic Quartz Met (308n)	—	Reference
GRN	Primary Color Exterior, Atomic	—	Reference
GRS	Family Code, Governor	1988	GM dated
GRV	P, TRM, M, TRIM COMBINATION, VINYL, GENERIC GRAY, VAR 1, 20605 E, 1	—	GM sourced
GRW	P, GRL, R, GRILLE, RADIATOR MOUNTED this code has more than one documented meaning — filter by year	1986	GM sourced
GRX	Primary Color Exterior, Rain Forest	—	Reference
GS0	P, RAX, M, AXLE REAR, 6.43 RATIO	1999	Provisional
GS1	P, SSR, M, SUSPENSION REAR, DELETE---	1999	Provisional
GS2	Fleet Incentive Keyspan Energy Solutions, Inc. (n/w-trk Gst)	—	Reference
GS3	P, SSR, M, SUSPENSION REAR, 4,200 LB, COIL SPRING, W/ RUBBER BUSHINGS,, 1720 MM TRACK, INDEPENDENT, 11017	—	Provisional
GS4	Stabilizer Shaft Rear High Gravity	—	Reference
GS5	AXLE REAR, 4.11 RATIO	—	Provisional
GS6	Exterior color Graywood Metallic, deleted for 2022	2022	GM sourced
GS7	Red Hot	2021	GM sourced
GS8	P, RAT, M, RATIO, TRANSAXLE FINAL DRIVE 3.94 (USE OPTION FX1)	1997	Provisional
GS9	P, RAX, M, AXLE REAR, 3.46 RATIO	1998	GM sourced
GSA	P, SSR, M, SUSPENSION REAR, 46,000 LB (20,866 KG), HEND RT460, 54 IN BEAM, W/BRONZE CENTER BUSHINGS, 607	—	GM sourced
GSB	Primary Color Exterior, Solid White	—	Reference
GSC	Primary Color Exterior, Dusk Gray	—	Reference
GSD	Primary Color Exterior, Escuna Silver this code has more than one documented meaning — filter by year	—	Reference
GSE	Primary Color Exterior, Moroccan Beige	—	Reference
GSF	Primary Color Exterior, Urban Yellow	—	Reference
GSG	Primary Color Exterior, Amazon Green	—	Reference
GSH	Primary Color Exterior, Sparkle Red this code has more than one documented meaning — filter by year	—	Reference
GSI	Model Conversion Sport Gsi	—	Reference
GSJ	P, SSR, M, SUSPENSION REAR, 21,000 LB (9,526 KG), AIR, 607	—	GM sourced
GSK	Cherry Red Tintcoat	2022	GM sourced
GSL	P, SSR, M, SUSPENSION REAR, 15,000 LB (6,804 KG), TAPERED LEAF, LO-PRO, 607	—	GM sourced
GSM	P, SSR, M, SUSPENSION REAR, 17,950 LB (8,142 KG), TAPERED LEAF, LO-PRO, 607	—	GM sourced
GSN	C, SSR, M, SUSPENSION REAR, HENDRICKSON RT343, 34000 LB, 52 INCH BEAMS,, WITH RUBBER BUSHINGS this code has more than one documented meaning — filter by year	1999	GM sourced
GSO	Primary Color Exterior, Corcega Blue	—	Reference
GSP	Primary Color Exterior, Titan Black	—	Reference
GSQ	Primary Color Exterior, Bretana Gray	—	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.