← All owner tools · Decode your own SPID label with the GM RPO decoder
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| 001 | P RAT, M RATIO, 3.70 | 1991 | GM sourced |
| 001 | Rat, M Ratio, 3.70 | 1991 | GM dated |
| 002 | P RAT, M RATIO, 4.11 (4 1/9) | 1991 | GM sourced |
| 002 | Rat, M Ratio, 4.11 (4 1/9) | 1991 | GM dated |
| 003 | Rat, M Ratio, 4.33 | 1991 | GM dated |
| 003 | P RAT, M RATIO, 4.33 | 1991 | GM sourced |
| 004 | Rat, M Ratio, 4.78 | 1994 | GM dated |
| 004 | P RAT, M RATIO, 4.78 | 1994 | GM sourced |
| 005 | Rat, M Ratio, 4.56 (4 5/9) | 1991 | GM dated |
| 005 | P RAT, M RATIO, 4.56 (4 5/9) | 1991 | GM sourced |
| 006 | Rat, M Ratio, 4.63 (4 5/8) | 1996 | GM dated |
| 006 | P RAT, M RATIO, 4.63 (4 5/8) | 1996 | GM sourced |
| 007 | Rat, M Ratio, 3.07 | 1997 | GM dated |
| 007 | P RAT, M RATIO, 3.07 | 1997 | GM sourced |
| 008 | Rat, M Ratio, 4.88 | 1996 | GM dated |
| 008 | P RAT, M RATIO, 4.88 | 1996 | GM sourced |
| 009 | Rat, M Ratio, 5.29 | 1991 | GM dated |
| 009 | P RAT, M RATIO, 5.29 | 1991 | GM sourced |
| 00A | Spare wheel upgrade Chevrolet Silverado 1500 | 2022–2023 | GM sourced |
| 00A | Wheel Spare 17 X 8.0, J, Steel, Design 2 | — | Reference |
| 00D | Not Equipped with Climate Control Knob Digital Temperature Display Chevrolet Silverado 1500 | 2022 | Provisional |
| 00G | Not Equipped with Heated Steering Wheel, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00L | Ccl, R Secondary Color, Exterior, Prime | 1989 | GM dated |
| 00L | P CCL, R SECONDARY COLOR, EXTERIOR, PRIME | 1989 | GM sourced |
| 00L | Exterior Color,secondary,prime,union City Body | — | GM dated |
| 00R | Not Equipped with Heated Rear Outboard Seats, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00U | Ccu, M Primary Color, Exterior, Prime | 1989 | GM dated |
| 00U | P CCU, M PRIMARY COLOR, EXTERIOR, PRIME | 1989 | GM sourced |
| 00U | Exterior Color,primary,prime,upper,union City Body | — | GM dated |
| 00V | Not Equipped with Heated or Ventilated Front Seats, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00Y | Not Equipped with Rear Park Assist, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 00Z | Not Equipped with Front and Rear Park Assist, see dealer for details Chevrolet Silverado 1500 | 2022–2023 | Provisional |
| 010 | Rat, M Ratio, 5.43 | 1991 | GM dated |
| 010 | P RAT, M RATIO, 5.43 | 1991 | GM sourced |
| 011 | Rat, M Ratio, 5.57 (5 4/7) | 1991 | GM dated |
| 011 | P RAT, M RATIO, 5.57 (5 4/7) | 1991 | GM sourced |
| 012 | Rat, M Ratio, 5.83 | 1991 | GM dated |
| 012 | P RAT, M RATIO, 5.83 | 1991 | GM sourced |
| 013 | Rat, M Ratio, 3.73 | 1995 | GM dated |
| 013 | P RAT, M RATIO, 3.73 | 1995 | GM sourced |
| 014 | Rat, M Ratio, 6.14 (6 1/7) | 1991 | GM dated |
| 014 | P RAT, M RATIO, 6.14 (6 1/7) | 1991 | GM sourced |
| 015 | Rat, M Ratio, 6.17 | 1991 | GM dated |
| 015 | P RAT, M RATIO, 6.17 | 1991 | GM sourced |
| 016 | Rat, M Ratio, 5.25 | 1991 | GM dated |
| 016 | P RAT, M RATIO, 5.25 | 1991 | GM sourced |
| 017 | Rat, M Ratio, 6.50 | 1991 | GM dated |
| 017 | P RAT, M RATIO, 6.50 | 1991 | GM sourced |
| 018 | Rat, M Ratio, 6.65 | 1989 | GM dated |
| 018 | P RAT, M RATIO, 6.65 | 1989 | GM sourced |
| 019 | Rat, M Ratio, 6.67 | 1989 | GM dated |
| 019 | P RAT, M RATIO, 6.67 | 1989 | GM sourced |
| 01A | Stc, R Stripe Color, Accent, Two Tone, Silver/gunmetal (1995) | 1998 | GM dated |
| 01A | P STC, R STRIPE COLOR, ACCENT, TWO TONE, SILVER/GUNMETAL (1995) | 1998 | GM sourced |
| 01A | Stripe Color Accent, Two Tone, Silver/gunmetal | — | GM dated |
| 01A | Trim Color Seat Jet Black | — | GM dated |
| 01B | Trim Color Seat LT Neutral | — | Reference |
| 01C | Trim Color Seat LT Titanium | — | Reference |
| 01D | Trim Color Seat LT Cashmere | — | Reference |
| 01E | Trim Color Seat DK Titanium | — | Reference |
The full list, A to Z
Showing 701–800 of 959 codes beginning with E. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| EMB | Trim Seat Cloth, Track | — | Reference |
| EMD | Trim Seat Cloth, Pixel | — | Reference |
| EME | Trim Seat Cloth, Crest | — | Reference |
| EMF | Trim Seat Cloth, Range | — | Reference |
| EMG | Trim Seat Cloth, Speed | — | Reference |
| EMI | Trim Seat Cloth, Control | — | Reference |
| EMK | Trim Seat Leather, Tuscany Matte Opulent Mini Perf, Var 1 | — | Reference |
| EML | Trim Seat Cloth, Ribbon (2) | — | Reference |
| EMQ | Trim Seat Cloth, Pantile | — | Reference |
| EMR | Trim Seat Cloth, Organic | — | Reference |
| EMS | Family Code, Emission System | 1988 | GM dated |
| EMY | Trim Seat Cloth, Tracery | — | Reference |
| EMZ | Trim Seat Vinyl, Sheffield | — | Reference |
| EN0 | Engine None | — | Reference |
| EN1 | P, WLB, R, WHEELBASE, 208 INCH this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| EN2 | P, HTR, M, HVAC SYSTEM, PROVISIONS - DELETE this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| EN3 | P, COVER, CARGO, STORAGE SYSTEM, 20227 | — | GM sourced |
| EN4 | P, CRC, R COVER, RR COMPT, HARD, RR COMPT, CARGO, 1213 | — | GM sourced |
| EN5 | P, END GATE, -LOCKING- this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| EN6 | P, CRC, R COVER, RR COMPT, HARD FOLDING, RR COMPT, CARGO, 20426 | — | GM sourced |
| EN8 | P, WLB, R WHEELBASE, 215 INCH | 1997 | GM sourced |
| EN9 | P, WLB, R WHEELBASE, 216 INCH this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| ENA | Lever Auto Trans, Shift, Step Gate Type | — | Reference |
| ENB | Lever Auto Trans, Shift, Step Gate Type | — | Reference |
| ENC | P, HVAC PROVISIONS, AUXILLIARY HEATER PLUMBING & WIRING this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| ENG | Family Code, Engine | 1988 | GM dated |
| ENL | Engine control | 2026 | GM sourced |
| ENN | P, VALVE, ENGINE, SODIUM FILL, LP GAS CONVERSION this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ENP | FAMILY CODE, ENTERTAINMENT PKG, 1106 | — | Provisional |
| ENT | Trim Seat Cloth, Windstroller | — | Reference |
| ENU | P, HTR, M HVAC SYSTEM, PROVISIONS ENGINE DRESS & COMPRESSOR this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| ENV | P, HTR, M HVAC SYSTEM, PROVISIONS ENGINE DRESS, COMPRESSOR & CONDENSER this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| ENW | Accessory Instrument Cluster Hood - Alternate Design | — | Reference |
| ENX | Trim Seat Cloth/leatherette, Windstroller, Var 1 | — | Reference |
| EOA | P, FIN, R FLEET INCENTIVE, BLOCKBUSTER, INC. (J/W), 20826 | — | Provisional |
| EOB | P, FIN, R FLEET INCENTIVE, VIRCO CORPORATION (D/H/U/V-TRK CKGMLST), 20912 | — | Provisional |
| EOC | P, CONTROL, ENGINE OIL COOLING (INCREASED FLOW) | 1994 | GM sourced |
| EOD | P, FIN, R FLEET INCENTIVE, CROWLEY MARITIME CORPORATION (N-TRK CK), 20826 | — | Provisional |
| EOE | P, FIN, R FLEET INCENTIVE, DAMON INDUSTRIES (U), 20827 | — | Provisional |
| EOF | C, EQUIPMENT, ENGINE OIL FILL TUBE RELOCATION this code has more than one documented meaning — filter by year | 1995 | GM sourced |
| EOG | P, FIN, R FLEET INCENTIVE, BRADY SERVICES (D/W-TRK CKGMLST), 20828 | — | Provisional |
| EOH | P, FIN, R FLEET INCENTIVE, PRATT COMMUNICATIONS (TRK CKST), 20903 | — | Provisional |
| EOJ | P, FIN, R FLEET INCENTIVE, MCKESSON PHARMACEUTICAL (C/K/U/W-TRK GMLST), 20904 | — | Provisional |
| EOK | P, FIN, R FLEET INCENTIVE, ORPHAN MEDICAL, INC. (W), 20904 | — | Provisional |
| EOL | P, FIN, R FLEET INCENTIVE, UTI-UNDERGOUND TECHNOLOGY, INC. (TRK ST), 20905 | — | Provisional |
| EOM | P, FIN, R FLEET INCENTIVE, ONE OK (TRK CKG), 20906 | — | Provisional |
| EON | P, FIN, R FLEET INCENTIVE, EL PASO CORPORATION (W-TRK CKGML), 20918 | — | Provisional |
| EOP | P, FIN, R FLEET INCENTIVE, HOME BUILDERS BUYING ALLIANCE (TRK CKGMLST), 20906 | — | Provisional |
| EOQ | P, FIN, R FLEET INCENTIVE, REYNOLDS, INC. (W-TRK CKST), 20906 | — | Provisional |
| EOR | P, FIN, R FLEET INCENTIVE, ALLIED WASTE INDUSTRIES, INC. (TRK CKST), 20910 | — | Provisional |
| EOS | P, FIN, R FLEET INCENTIVE, HILL MECHANICAL GROUP (TRK GML), 21030 | — | Provisional |
| EOT | P, FIN, R FLEET INCENTIVE, MERCHANTS BUILDING SERVICES, INC (N/W-TRK CKGMLST), 20910 | — | Provisional |
| EOU | P, FIN, R FLEET INCENTIVE, BERGEN INDUSTRIES, INC. (TRK CK), 20910 | — | Provisional |
| EOV | P, FIN, R FLEET INCENTIVE, DELUXE CORPORATION (D/H/N/V/W-TRK ST), 20918 | — | Provisional |
| EOW | P, FIN, R FLEET INCENTIVE, VIACOM OUTDOOR (TRK CKGML), 20917 | — | Provisional |
| EOX | P, FIN, R FLEET INCENTIVE, BERRY CONSTRUCTION (J/W-TRK CK), 21009 | — | Provisional |
| EOY | P, FIN, R FLEET INCENTIVE, AEX, INC. (TRK ST), 20912 | — | Provisional |
| EOZ | P, LOCAL, TENNESSEE CONSOLIDATED COAL CO. (TRK CK), 20912 | — | Provisional |
| EP1 | P, EQUIPMENT, INDUSTRIAL this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| EP2 | P, EQUIPMENT, MARINE this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| EP3 | P, EQUIPMENT, COMMERCIAL | 1994 | GM sourced |
| EP4 | P, EQC, R EQUIPMENT ADDITIONAL, BOTSWANA this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| EP5 | P, WLB, R WHEELBASE, 221.5 INCH, 10405 | — | GM sourced |
| EP6 | P, WLB, R WHEELBASE, 222 INCH this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| EP7 | C, WLB, R WHEELBASE, 223 INCH this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| EP9 | C, WLB, R WHEELBASE, 225 INCH this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| EPA | Pocket Front Seat, Cush Frt, LH | — | Reference |
| EPB | Pocket Front Seat, Cush Frt, RH | — | Reference |
| EPD | Family Code, Decal Package | 1989 | GM dated |
| EPE | P, MSM, R MODEL CONVERSION, 1.8 CDE | 1999 | GM sourced |
| EPF | Identification Effective Point Control, Brake | — | Reference |
| EPH | Electronic Precision Shift | 2026 | GM sourced |
| EPM | Model Conversion All Wheel Drive | — | Reference |
| EPP | Identification Epa Mass Certification | — | Reference |
| EPR | Model Conversion All Wheel Drive, Var 1 | — | Reference |
| EPT | Cover, RR Compt Power, Soft, Tonneau | — | Reference |
| EPY | Trim Seat Cloth, Ribbon (3) | — | Reference |
| EPZ | Trim Seat Cloth, Neo | — | Reference |
| EQ1 | P, WLB, R WHEELBASE, 246 INCH (6248 MM), 1213 | — | GM sourced |
| EQ3 | P, WLB, R WHEELBASE, 228 INCH this code has more than one documented meaning — filter by year | 1986 | GM sourced |
| EQ4 | P, WLB, R WHEELBASE, 229 INCH this code has more than one documented meaning — filter by year | 1999 | GM sourced |
| EQ7 | P, WLB, R WHEELBASE, 232 INCH | 1993 | GM sourced |
| EQ8 | P, WLB, R WHEELBASE, 233 INCH (6045 MM), 1213 | — | GM sourced |
| EQ9 | P, EQUIPMENT, UNDERRIDE PROTECTION this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| EQB | C, WLB, R WHEELBASE, 219 INCH this code has more than one documented meaning — filter by year | 1995 | GM sourced |
| EQC | Family Code, Equipment Additional | 1996 | GM dated |
| EQD | C, WLB, R WHEELBASE, 305 INCH | 1995 | GM sourced |
| EQE | P, WLB, R WHEELBASE, 220 INCH (5588 MM), 1211 | — | GM sourced |
| EQG | Trim Seat Cloth, Megan | — | Reference |
| EQH | Trim Seat Cloth, Marine | — | Reference |
| EQJ | Trim Seat Cloth, Tall Grass SR | — | Reference |
| EQK | Trim Seat Leather, Pinnacle | — | Reference |
| EQL | P, FIN, R FLEET INCENTIVE, LORRILARD TOBACCO COMPANY (H/U/W), 20523 | — | Provisional |
| EQM | P, FIN, R FLEET INCENTIVE, PAMECO CORPORATION (TRK CK), 20523 | — | Provisional |
| EQP | Family Code, Emission Equipment | 1993 | GM dated |
| EQX | Trim Seat Cloth, Wicker SR | — | Reference |
| EQY | Trim Seat Cloth, Elocution | — | Reference |
| EQZ | Trim Seat Cloth, Streaming | — | Reference |
| ER2 | P, WLB, R WHEELBASE, 189 INCH, 111 | — | GM sourced |
| ER6 | P, WLB, R WHEELBASE, 240 INCH this code has more than one documented meaning — filter by year | 1984 | 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.