GM RPO Code Database

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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.

CodeMeaningYearsSourcing
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 1–100 of 922 codes beginning with U. One meaning shown per code — the best-sourced one we hold. Search above for the rest.

CodeMeaningYearsSourcing
U01 Lamps, Smoked Amber roof marker 2026 GM sourced
U02 P, CSR, M, CLUSTER, INST, KILO & MILES, DIGITAL SPEEDOMETER DISPLAY 1987 GM sourced
U03 P, HOR, R, HORN, NOISE REGULATION this code has more than one documented meaning — filter by year 1983 GM sourced
U04 Horn,single Note — Reference
U05 P, HOR, R, HORN, DUAL this code has more than one documented meaning — filter by year 1983 GM sourced
U06 P, HOR, R, HORN, THREE NOTE 1998 GM sourced
U07 P, HOR, R, HORN, FANFARE this code has more than one documented meaning — filter by year 1983 GM sourced
U08 P, HOR, R, HORN, DUAL ELECTRIC this code has more than one documented meaning — filter by year 1983 GM sourced
U09 P, HOR, R, HORN, FOUR NOTE this code has more than one documented meaning — filter by year 1983 GM sourced
U0A P, IDT, M, TRIM, CLOTH, ULTRA DELUXE 1996 Provisional
U0B P, SPP, R, PACKAGE, BRA MARKET-CORSA SUPER 1998 Provisional
U0C P, PARTS PKG, AIR CONDITIONING 1997 Provisional
U0D P, PARTS PKG, HEATER 1997 Provisional
U0E P, VEA, M VEHICLE APPLICATION, SHIPPED LOOSE PARTS (GMB CORSA WIND) PACKAGE 1997 Provisional
U0F P, PARTS PKG, ELECTRICAL CONVENIENCE FEATURES N.1 1997 Provisional
U0G P, PARTS PKG, MISCELLANEOUS PARTS FOR EXPORT 1997 Provisional
U0H P, IDENTIFICATION, BREAKING POINT 97 1/4 M.Y., 1109 E, 5 5, A — Provisional
U0I P, IDENTIFICATION, BREAKING POINT 98 1/2 M.Y. 1998 Provisional
U0J P, PARTS PKG, TAUMEL SEAT ADJUSTER 1999 Provisional
U0K P, IDENTIFICATION, BREAKING POINT 97 1/2 M.Y. 1998 Provisional
U0M P, CND, R CONVENIENCE PKG, "SUPER DELUXE" 1998 Provisional
U0O P, PARTS PKG, GMB MODELS MECHANICAL IMPROVEMENT VAR. 2, 20925 E, 5 5, A — Provisional
U0P P, CND, R CONVENIENCE PKG, "COMFORT" 1997 Provisional
U0Q P, PARTS PKG, PICK-UP SINGLE CAB 4 X 4 DIESEL ENGINE 1998 Provisional
U0R P, PARTS PKG, FAM I ENGINES W/DIRECT IGNITION SYS GENERATION II 1997 Provisional
U0S P, SPP, R PACKAGE, GMB-CORSA PIQUET 1997 Provisional
U0T P, PARTS PKG, GMB MODELS MECHANICAL IMPROVEMENT VAR. 1, 20613 E, 5 5, A — Provisional
U0U P, IDENTIFICATION, BREAKING POINT 98 1/4 M.Y. 1998 Provisional
U0V P, PARTS PKG, GMB MODELS FACE LIFT VAR. 1, 20613 E, 5 5, A — Provisional
U0X P, PARTS PKG, GMB MODELS IMPROVEMENT VAR. 1 1999 Provisional
U0Y P, PARTS PKG, GMB MODELS IMPROVEMENT VAR. 2 1999 Provisional
U10 P, SPR, M SPEAKER SYSTEM, 10, QUAD FRT DR MTD, QUAD RR DR MTD, 2 PKG SHELF SUBWOOFERS & AMPLIFIER 1992 Provisional
U11 C, CSR, M CLUSTER, INST, POLICE, CERTIFIED SPEEDO this code has more than one documented meaning — filter by year 1990 GM sourced
U12 Lighting, perimeter this code has more than one documented meaning — filter by year 2026 GM sourced
U13 Horn,low Note — Reference
U14 P, CSR, M CLUSTER, INST, COOL TEMP, SPEEDO, FUEL, CLOCK 1998 GM sourced
U15 P, INDICATOR, WARNING, SPEEDO this code has more than one documented meaning — filter by year 1984 GM sourced
U16 P, TACHOMETER, ENGINE this code has more than one documented meaning — filter by year 1984 GM sourced
U17 Cluster Inst,cool Temp,speedo,fuel,clock,trip Odom — Reference
U18 P, SPO, R SPEEDOMETER, INST, KILO this code has more than one documented meaning — filter by year 1988 GM sourced
U19 P, SPO, R SPEEDOMETER, INST, KILO & MILES, KILO ODOMETER this code has more than one documented meaning — filter by year 1988 GM sourced
U1A P, RDO, M RADIO, AM/FM STEREO, SEEK, MULTI CD, ETR, NAVIGATION, FADER this code has more than one documented meaning — filter by year 1999 GM sourced
U1B P, RDO, M RADIO, AM STEREO-FM STEREO, SEEK/SCAN, COMPACT DISC, HPS,CLOCK, ETR 1998 GM sourced
U1C P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, CD, CLOCK, ETR 1999 GM sourced
U1D Advanced Trailering System, deleted for 2022 2022 GM sourced
U1E P, RDO, M RADIO, AM STEREO/FM STEREO, SEEK/SCAN, COMPACT DISC, HPS, ETR 1997 GM sourced
U1F P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, AUTO REV MUSIC SEARCH CASS, COMPACT DISC, HPS, CLOCK, ETR 1987 GM sourced
U1G P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, CD, CLOCK, EQLZR, RDS, ETR, MP3, 20207 E, 1 — GM sourced
U1H P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, AUTO REV MUSIC SEARCH CASS, CD, CLOCK, EQLZR, RDS, ETR, MP3, 20207 E, 1 — GM sourced
U1J P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, MULTI CD, ETR, HPS I/P, AUTO TONE, DSP, 20903 E, 8 — GM sourced
U1K P, RDO, M RADIO, AM/FM/LW/SW STEREO, SEEK/SCAN, CD, RDS, DSP,, SPD-VOL CNTL, ETR, NAVIGATION 1997 GM sourced
U1L P, RDO, M RADIO, AM STEREO/FM STEREO, SEEK/SCAN, AUTO REV MUSIC SEARCH CASS, CLOCK, ETR 1997 GM sourced
U1M P, RDO, M RADIO, AM/FM/LW/SW STEREO, SEEK/SCAN, CD, RDS, DSP, SPD-VOL CNTL, ETR, NAVIGATION, PHONE PROV 1997 Provisional
U1N P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, AUTO REV MUSIC SEARCH CASS, CLOCK, EQLZR, RDS, ETR this code has more than one documented meaning — filter by year 1997 GM sourced
U1P P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, CD, CLOCK, EQLZR, RDS, ETR this code has more than one documented meaning — filter by year 1996 GM sourced
U1Q P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, AUTO REV MUSIC SEARCH CASS, CD, CLOCK, EQLZR, RDS, ETR this code has more than one documented meaning — filter by year 1997 GM sourced
U1R P, RDO, M RADIO, AM STEREO/FM STEREO, SEEK/SCAN, AUTO REV MUSIC SEARCH CASS, CD, CLOCK, ETR 1989 GM sourced
U1S P, PLAYER, MULTIPLE COMPACT DISC 1990 GM sourced
U1T P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, CD, ETR, I/P, AUTO TONE, 1103 E, 8 — GM sourced
U1U P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, MULTI CD, ETR, I/P,, AUTO TONE, 1103 E, 8 — Provisional
U1V P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, MULTI CD, CLOCK, ETR, AUTO TONE, 1103 E, 8 — GM sourced
U1W P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, CD, ETR, SECURITY FEATURE 1998 GM sourced
U1X P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, MULTI CD, CLOCK, ETR, HPS, AUTO TONE, 1103 E, 8 — GM sourced
U1Y P, RDO, M RADIO, AM/FM STEREO, SEEK/SCAN, MULTI CD, ETR, HPS,, I/P, AUTO TONE, 1103 E, 8 — Provisional
U1Z P, PLAYER, MULTIPLE COMPACT DISC, PASS COMPARTMENT 1998 GM sourced
U20 P, CSR, M CLUSTER, INST, OIL, COOL TEMP, VOLTS, TRIP ODOM, TACH, FUEL DATA DISPLAY 1984 GM sourced
U21 P, CSR, M CLUSTER, INST, OIL, COOL TEMP, VOLTS, TACH this code has more than one documented meaning — filter by year 1984 GM sourced
U22 P, LAMP, EXTR, ILLUMINATED ENTRY 1998 Provisional
U23 P, CSR, M CLUSTER, INST, TRIP ODOM 1988 GM sourced
U24 P, LAMP, INTR, I/P COMPT, COURTESY - DELETE 1998 GM sourced
U25 P, LAMP, INTR, RR COMPT, COURTESY this code has more than one documented meaning — filter by year 1984 GM sourced
U26 P, LAMP, INTR, ENG COMPT, COURTESY this code has more than one documented meaning — filter by year 1984 GM sourced
U27 P, LAMP, INTR, I/P COMPT, COURTESY this code has more than one documented meaning — filter by year 1984 GM sourced
U28 P, LAMP, INTR, ASHTRAY, COURTESY this code has more than one documented meaning — filter by year 1997 GM sourced
U29 P, LAMP, INTR, I/P COURTESY this code has more than one documented meaning — filter by year 1998 GM sourced
U2A P, CSR, M CLUSTER, INST, COOL TEMP, TRIP ODOM, DR INFO CTR, DIGITAL 1988 GM sourced
U2B P, CSR, M CLUSTER, INST, OIL, COOL TEMP, TACH, TRIP ODOM 1988 GM sourced
U2C P, CSR, M CLUSTER, INST, KILO & MILES, MILES ODOM 1988 GM sourced
U2D P, CSR, M CLUSTER, INST, COOL TEMP, TRIP ODOM, TACH, FUEL,, SPEEDO, CLOCK 1998 GM sourced
U2E P, CSR, M CLUSTER, INST, COOL TEMP, TRIP ODOM 1988 GM sourced
U2F P, CSR, M CLUSTER, INST, OIL, COOL TEMP, TRIP ODOM, TACH, DR INFO CTR, COMPASS, TURBO BOOST 1998 GM sourced
U2G P, CSR, M CLUSTER, INST, COOL TEMP, TRIP ODOM, DIGITAL 1991 GM sourced
U2H P, CSR, M CLUSTER, INST, OIL, COOL TEMP, TRIP ODOM, TACH, DR INFO CTR, COMPASS, TURBO BOOST, ANALOG, 405 E, 4 — Provisional
U2I Cluster Inst, Analog, Miles — Reference
U2J SiriusXM, delete 2026 GM sourced
U2K SiriusXM with 360L 2026 GM sourced
U2L Radio, HD 2019 Reference
U2M P, DAS, R DIGITAL AUDIO SYSTEM, TRI-BAND, 121 E, 1 — GM sourced
U2N P, ANT, M ANTENNA, WINDSHIELD, RR WINDOW, RADIO, TELEVISION (TV), 1005 E, 4 — Provisional
U2O C, AIC, R PANEL CENTER, INSTRUMENT , SILVER PAINTED INSERT, 11120 E, 0 — Provisional
U2P C, AIC, R PANEL CENTER, INSTRUMENT , PAINTED INSERT 1999 Provisional
U2Q Digital Audio System Integrated Type Dab/dab+/dmb-r — Reference
U2R P, INF, M INFOTAINMENT SYSTEM, 001, 10824 E, 4 — GM sourced
U2S P, INF, M INFOTAINMENT SYSTEM, 002, 10824 E, 4 — GM sourced
U2T P, INF, M INFOTAINMENT SYSTEM, 003, 10824 E, 4 — GM sourced
U2U P, INF, M INFOTAINMENT SYSTEM, 004, 10824 E, 1 — GM sourced
U2V P, INF, M INFOTAINMENT SYSTEM, 005, 10824 E, 4 — GM sourced
U2W P, INF, M INFOTAINMENT SYSTEM, 006, 10824 E, 1 — GM sourced
U2X P, INF, M INFOTAINMENT SYSTEM, 007, 10824 E, 4 — GM sourced
U2Y P, INF, M INFOTAINMENT SYSTEM, 008, 10824 E, 1 — 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.

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