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 601–671 of 671 codes beginning with S. One meaning shown per code — the best-sourced one we hold. Search above for the rest.

Code	Meaning	Years	Sourcing
SNU	C, CCU, M PRIMARY COLOR, EXTERIOR, INCA GOLD, SCHWANS, WE7952	1999	GM sourced
SPA	Family Code, Adapter	1988	GM dated
SPC	FAMILY CODE, SALES PROCESSING, 10209	—	Provisional
SPF	Family Code, Suspension FRT	1998	GM dated
SPK	Family Code, Key	1988	GM dated
SPL	Family Code, Spotlamp	1990	GM dated
SPM	Plant Code San Luis Potosi, Mexico	—	Reference
SPO	Family Code, Speedometer	1988	GM dated
SPP	Family Code, Package	1999	GM dated
SPQ	Package Quiet Spring Package	—	Reference
SPR	Family Code, Speaker System	1988	GM dated
SPS	Family Code, Sleeve	1988	GM dated
SPT	Family Code, Tire Spare	1988	GM dated
SPU	Family Code, Spoiler	1988	GM dated
SPY	Black lug nuts (LPO dealer-installed accessory)	2026	GM sourced
SPZ	Black lug nut and wheel lock kit (LPO dealer-installed accessory)	2026	GM sourced
SQ9	20 inch Machined Aluminum Bolt Pattern with High Gloss Black Accents wheels (LPO dealer-installed accessory)	2026	GM sourced
SR1	Sales Package Ergonomic Sport Seat, Driver	—	Reference
SRI	Wheels, 20 inch High gloss Black painted wheel with Black center caps	2026	GM sourced
SRJ	Model Conversion Chevrolet Convenience And Connectivity Package	—	Reference
SRK	Model Conversion Chevrolet 2lt	—	Reference
SRL	22 inch Black with selective machining wheels (LPO dealer-installed accessory)	2026	GM sourced
SRM	Model Conversion Chevrolet 2ss	—	Reference
SRO	Sales Package Comfort Rear Seat	—	Reference
SRP	Family Code, Starter	1990	GM dated
SRR	Model Conversion 2lt	—	Reference
SRS	Family Code, Steering	1988	GM dated
SRT	Model Conversion 1lt	—	Reference
SRU	Sales Package Convenience And Connectivity Package Var 2	—	Reference
SRV	22 inch Multi-spoke Gloss Black wheels (LPO dealer-installed accessory) this code has more than one documented meaning — filter by year	2026	GM sourced
SRW	P, CHASSIS, 9,900 LBS GVW, SINGLE REAR WHEEL,, RIDE & HANDLING, 20911	—	GM sourced
SRY	Sales Package Ergonomic Sport Seats, Driver/frt-pass	—	Reference
SRZ	Sales Package Launch Edition	—	Reference
SSA	Plant Code Struandale, South Africa	—	Reference
SSC	Performance Package Super Sport	—	Reference
SSD	FAMILY CODE, SEPARATOR SECONDARY, 20214	—	Provisional
SSG	P, GRAPHIC, SWITCH FUNCTION SYMBOL, 20312 E 1	—	GM sourced
SSH	P, PLT, R PLANT CODE, SPRING HILL, TENN, USA this code has more than one documented meaning — filter by year	1997	GM sourced
SSI	22 inch Multi-spoke Chrome wheels (LPO dealer-installed accessory)	2025	GM sourced
SSL	P, ORNAMENTATION, EXTR, NAMEPLATE, GMC SIERRA SL, 10424	—	Provisional
SSP	Family Code, Suspension System	1988	GM dated
SSQ	P, BOX, QTR SIDE, STOWAGE this code has more than one documented meaning — filter by year	1999	GM sourced
SSR	Family Code, Suspension RR	1998	GM dated
SSS	Family Code, Sensor	1988	GM dated
SSW	22 inch Bright multi-spoke wheels (LPO dealer-installed accessory)	2026	GM sourced
SSX	22 inch 12-Spoke Gloss Black alloy wheels (LPO dealer-installed accessory)	2026	GM sourced
ST1	Touring Package	2026	GM sourced
ST7	LT Midnight Edition, includes (NZQ) 20 inch Black painted aluminum wheels and (QT0) P275/55R20 tires	2019	Reference
STA	Family Code, Stabilizer Shaft FRT	1991	GM dated
STC	Family Code, Stripe Color	1988	GM dated
STE	P, PLT, R, PLANT CODE, ST THERESE, PQ, CANADA this code has more than one documented meaning — filter by year	1997	GM sourced
STH	Rally Edition	2026	GM sourced
STO	Remote Stop Charging	—	Reference
STP	Family Code, Stripe	1988	GM dated
STS	Family Code, Seat	1999	GM dated
STW	P, SWL, M, STEERING WHEEL, LEATHER WRAPPED WITH REDUNDANT CONTROLS this code has more than one documented meaning — filter by year	1998	GM sourced
STX	Equipment 'ltz' Sales Package #2	—	Reference
STZ	Equipment 'ltz' Sales Package	—	Reference
SU3	Suspension,standard	—	Reference
SU4	Suspension,heavy Duty	—	Reference
SVA	P, HOLDER, CUP this code has more than one documented meaning — filter by year	1998	GM sourced
SVB	P, HOLDER, CUP, RR, 10620 E 0	—	GM sourced
SVI	Fleet Incentive Pilgrims Pride (trk Ckg)	—	Reference
SVL	C, CCL, R, SECONDARY COLOR, EXTERIOR, LIME GREEN, WE346C, 417	—	Provisional
SVU	C, CCU, M, PRIMARY COLOR, EXTERIOR, LIME GREEN, WE346C, 417	—	Provisional
SWC	FAMILY CODE, STEERING WHEEL COLOR, 1011	—	Provisional
SWL	Family Code, Steering Wheel	1988	GM dated
SWN	P, FLEET PROGRAM, SCHWAN this code has more than one documented meaning — filter by year	1989	GM sourced
SWP	C, VEHICLE, SWEEPER this code has more than one documented meaning — filter by year	1996	GM sourced
SWS	Vehicle Paint Striper	—	Reference
SWT	P, LOK, R, LOCK, SPARE WHEEL, 314	—	GM sourced

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.