← 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 501–600 of 922 codes beginning with U. One meaning shown per code — the best-sourced one we hold. Search above for the rest.
| Code | Meaning | Years | Sourcing |
|---|---|---|---|
| UG7 | P, ONS, R, COMMUNICATION SYSTEM, VEHICLE, G.P.S. 4, 211 this code has more than one documented meaning — filter by year | — | GM sourced |
| UG9 | P, GAGE, ENGINE, HOUR METER (OPERATED BY PARK BRAKE REL) | 1999 | GM sourced |
| UGA | Recovery hooks | 2026 | GM sourced |
| UGB | Lamp Cargo, Ece | — | Reference |
| UGD | Lamp FRT Marker, Led | — | Reference |
| UGL | Provisions Low Cost Veh Tacking And Immobilization System Hardware PR | — | Reference |
| UGM | Sensor Equipment Outside Air Temperature Sensor | — | Reference |
| UGN | Enhanced Automatic Emergency Braking | 2026 | GM sourced |
| UGP | Am/fm Stereo, Seek/scan, Cd, Etr, Clock Dsp, Mp3/wma,s/din | — | Reference |
| UGQ | Am/fm Stereo, Seek/scan, Cd, Etr, Clock Dsp, Mp3/wma,d/din,rds | — | Reference |
| UGT | Radio Am/fm Stereo, Seek/scan, Cd, Etr, Clock, Dsp, Mp3/ Wma, S/din, Aux Jack | — | Reference |
| UGU | Radio Am/fm/xm, Touchscreen, Connected, Hd, Cd, Dvd, Aux Jack, USB Port, Dvd Rse | — | Reference |
| UGV | Radio Am/fm Stereo, Cd-rom, Caf, Rsa, Music Navigator (australia/new | — | Reference |
| UGX | Radio Am/fm/xm, Touchscreen, Navigation, Connected, HD Cd, Dvd, Aux Jack, USB Port, Dvd, Rse | — | Reference |
| UGY | Radio Am/fm/xm, Touchscreen, Navigation, Connected, HD Cd, Aux Jack, USB Port | — | Reference |
| UH0 | P, INDICATOR, SEAT BELT WARNING , LH, 620 E, 0 | — | GM sourced |
| UH1 | P, INDICATOR, SEAT BELT WARNING , RH, 620 E, 0 | — | GM sourced |
| UH2 | P, INDICATOR, SEAT BELT WARNING | 1984 | GM sourced |
| UH3 | P, INDICATOR, LOW TIRE PRESS, VAR 2, 412 E, 1 | — | GM sourced |
| UH4 | P, SWITCH, SIGNAL STAT 900 this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| UH5 | Rear Seat Belt Indicator | 2026 | GM sourced |
| UH6 | Seat belt indicator, third row | 2026 | GM sourced |
| UH7 | P, CSR, M, CLUSTER, INST, COOL TEMP this code has more than one documented meaning — filter by year | 1987 | GM sourced |
| UH8 | P, CSR, M, CLUSTER, INST, COOL TEMP, TRIP ODOM, TACH | 1991 | GM sourced |
| UH9 | P, CSR, M, CLUSTER, INST, COOL TEMP, TRIP ODOM, TACH, DR INFO CTR | 1997 | GM sourced |
| UHA | Lock Control, Entry Remote Entry Passive, Remote Start | — | Reference |
| UHB | Lock Control, Entry Remote Entry Passive, Remote Start, Specific Frequency | — | Reference |
| UHC | Lock Control, Entry Remote Entry Passive, Remote Start, Low Power | — | Reference |
| UHD | Lock Control, Entry Remote Entry Passive, Specific Frequency | — | Reference |
| UHF | Lock Control, Entry Remote Entry Passive | — | Reference |
| UHJ | Radio Am/fm Stereo, Single Cd, MP3 (aux In), Usb, Navigation (south AM | — | Reference |
| UHK | Radio Am/fm Stereo, Single Cd,mp3(aux In),usb,navigation (middle East) | — | Reference |
| UHL | C, VEHICLE, U-HAUL this code has more than one documented meaning — filter by year | 1993 | GM sourced |
| UHM | Radio Am/fm Stereo, Single Cd, MP3 (aux In), Usb, Navigation (austral | — | Reference |
| UHN | Wheels, 18 inch x 8.5 inch | 2026 | GM sourced |
| UHQ | Radio Am/fm Stereo, Single Cd, MP3 (aux In), Usb, Navigation (gmna) | — | Reference |
| UHR | Radio Am/fm Stereo, Single Cd,mp3(aux In),usb,navigation (europea | — | Reference |
| UHS | Driver Information Center, enhanced, 8 inch diagonal multicolor digital display | 2022 | Provisional |
| UHT | Horn Triple | — | Reference |
| UHU | Radio Am/fm/xm, Touchscreen, Non-connected, Hd, Cd, Aux Jack, USB Port | — | Reference |
| UHV | Radio Am/fm, Touchscreen, Navigation, Connected, Hd, CD Aux Jack, USB Port | — | Reference |
| UHW | Radio Am/fm, Touchscreen, Connected, Hd, Cd, Aux Jack, USB Port | — | Reference |
| UHX | Lane Keep Assist with Lane Departure Warning | 2026 | GM sourced |
| UHY | Automatic Emergency Braking | 2026 | GM sourced |
| UI2 | Radio Am/fm/xm, Touchscreen, Non-connected, Cd, Aux Jack USB Port | — | Reference |
| UI4 | Radio Am/fm/xm, Touchscreen, Connected, Cd, Dvd, Aux Jack, USB Port | — | Reference |
| UI5 | Radio Am/fm/xm, Touchscreen, Non-connected, Cd, Aux Jack USB Port, Dvd Rse | — | Reference |
| UI6 | Radio Am/fm/xm, Touchscreen, Connected, Cd, Aux Jack, USB Port | — | Reference |
| UI7 | Radio Am/fm/xm, Touchscreen, Navigation, Connected, CD Dvd, Aux Jack, USB Port, Dvd, Rse | — | Reference |
| UI8 | Radio Am/fm/xm, Touchscreen, Navigation, Connected, CD Aux Jack, USB Port | — | Reference |
| UIF | Radio Infotainment | — | Reference |
| UIK | P, FIN, R, FLEET INCENTIVE, KYOCERA MITA AMERICA (C/D/H/N/W), 20801 | — | Provisional |
| UIL | P, FIN, R, FLEET INCENTIVE, UIL HOLDINGS COMPANY (TRK CKGST), 20610 | — | Provisional |
| UIO | C, CSR, M, CLUSTER, NON ISO SYMBOLS GAS ENG, 1103 | — | GM sourced |
| UJ0 | Indicator Change Oil Light - Delete | — | Reference |
| UJ1 | P, INDICATOR, SYSTEM, BRAKE WARNING this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| UJ2 | P, INDICATOR, ENGINE OIL LIFE | 1991 | GM sourced |
| UJ3 | P, INDICATOR, SERVICE INTERVAL | 1999 | GM sourced |
| UJ4 | P, INDICATOR, DOOR AJAR | 1999 | GM sourced |
| UJ5 | REAR SEAT DVD ENTERTAINMENT SYSTEM - Includes dual DVD headrests this code has more than one documented meaning — filter by year | 2020 | GM sourced |
| UJ6 | P, INDICATOR, LOW TIRE PRESS this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| UJ7 | P, INDICATOR, BRAKE LINING WEAR | 1997 | Provisional |
| UJ8 | P, CSR, M, CLUSTER, INST, COOL TEMP, TACH, FUEL, SPEEDO, DR INFO CTR | 1998 | GM sourced |
| UJ9 | P, INDICATOR, LOW TIRE PRESS, VAR 1, 412 E, 1 | — | GM sourced |
| UJA | P, SWITCH, AUXILIARY POWER, 10525 | — | GM sourced |
| UJB | Switch Junction Box, Auxiliary Power | — | Reference |
| UJC | Switch Sport Mode | — | Reference |
| UJE | Switch Junction Box, Auxiliary Power (lighted) | — | Reference |
| UJF | Switch Junction Box, 6 Auxiliary Power (not Wired) | — | Reference |
| UJJ | Switch Junction Box, Lighted W/ Timer Relays | — | Reference |
| UJK | Switch Junction Box, 3 Auxiliary Power W/timer Relay Provisions | — | Reference |
| UJL | Radio Am/fm/xm, Touchscreen, Non-connected, Hd, Cd, Aux Jack, USB Port, Dvd Rse | — | Reference |
| UJM | Tire Pressure Monitoring System | 2026 | GM sourced |
| UJN | Tire Pressure Monitoring System | 2026 | GM sourced |
| UJO | Tire Press Indicator Deflation Detection System | — | Reference |
| UJS | Switch Junction Box, Strobe Light | — | Reference |
| UJT | Family Code, Joint Main | 1991 | GM dated |
| UK0 | P, LEVER, DIRECTIONAL SIGNAL, INCLUDES MULTI FUNCTIONS, JAPAN APPROVED | 1991 | GM sourced |
| UK1 | P, FRE, R, FREQUENCIES, JAPANESE | 1997 | GM sourced |
| UK2 | P, LEVER, DIRECTIONAL SIGNAL, INCLUDES MULTI FUNCTIONS, EEC APPROVED this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| UK3 | Steering wheel controls this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| UK4 | P, RDO, M, RADIO, AM/FM STEREO, CLOCK, SEEK, AUTO REV CASS, LED SECURITY | 1998 | GM sourced |
| UK5 | P, RDO, M, RADIO, AM/FM STEREO, SEEK/SCAN, AUTO REV CASS, ETR this code has more than one documented meaning — filter by year | 1985 | GM sourced |
| UK6 | P, RADIO CONTROL, RR SEAT & EARPHONE JACKS this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| UK7 | P, RDO, M, RADIO, AM/FM STEREO, SEEK/SCAN, AUTO REV CASS, LED, SECURITY, CODED DETACHABLE PANEL, DISPLAY | 1996 | Provisional |
| UK8 | P, RDO, M, RADIO, AM/FM STEREO, SEEK/SCAN, AUTO REV CASS, LED, SECURITY, CODED DETACHABLE PANEL | 1996 | GM sourced |
| UK9 | P, COMMUNICATION EQUIP, MOBILE COMMUNICATION, 211 E, 1 | — | Provisional |
| UKA | Radio Am/fm Stereo, Cd-rom, Caf, Music Navigator (korea Version) | — | Reference |
| UKC | Lane Change Alert with Side Blind Zone Alert | 2026 | GM sourced |
| UKD | Sensor Coolant Level | — | Reference |
| UKE | Display Eco Drive Assistance | — | Reference |
| UKF | Communication System Vehicle, Onstar Data Only Service | — | Reference |
| UKI | Blind Zone Steering Assist | 2026 | GM sourced |
| UKJ | Front Pedestrian Braking | 2026 | GM sourced |
| UKK | Rear Pedestrian Alert | 2026 | GM sourced |
| UKL | Super Cruise | 2026 | GM sourced |
| UKM | Lane Keep Assist with Lane Departure Warning | 2026 | GM sourced |
| UKN | Plant Code Uzdw, Uzbekistan | — | Reference |
| UKT | Front Pedestrian and Bicyclist Braking | 2026 | GM sourced |
| UKU | Accessory Convertible Top, Tonneau, Carbon Fiber | — | 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.