← 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 401–500 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 |
|---|---|---|---|
| UCW | Radio Am/fm Stereo, SD Nav, Cd-rom, Caf, Usb, Rsa, Voice Rec (gme Version) | — | Reference |
| UCX | Radio Am/fm Stereo, Seek/scan, Cd, Navigation | — | Reference |
| UCY | Radio Am/fm Stereo, Seek/scan, Dvd, Navigation | — | Reference |
| UCZ | Radio Am/fm Stereo, Seek/scan, Dvd, Navigation Rds, W/voice Rec Micro | — | Reference |
| UD0 | P, SENSOR INDICATOR, INFLATABLE RESTRAINT, FRT RH/CHILD PRESENCE, DETECTOR | 1999 | GM sourced |
| UD1 | P, CSR, M, CLUSTER, INST, OIL, COOL TEMP this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| UD2 | P, ALARM, VEHICLE SPEED, 105 K/H this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| UD3 | P, TACHOMETER, ENGINE, MECHANICAL W/HOUR METER | 1998 | Provisional |
| UD4 | P, ALARM, VEHICLE SPEED, 120 K/H this code has more than one documented meaning — filter by year | 1983 | GM sourced |
| UD5 | Front and Rear Park Assist | 2026 | GM sourced |
| UD6 | P, ALARM, EXHAUST TEMP this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| UD7 | Rear Park Assist | 2023 | GM sourced |
| UD8 | P, CLOCK, DIGITAL INDICATION & OUTSIDE THERMOMETER this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| UD9 | P, TACHOMETER, ENGINE - DELETE | 1998 | Provisional |
| UDA | OnStar and Wi-Fi deactivation | 2026 | GM sourced |
| UDB | Display Instrument Driver Info Enhanced (segmented) | — | Reference |
| UDC | Driver Information Center | 2026 | GM sourced |
| UDD | Driver Information Center, 4.2 inch diagonal | 2022 | Provisional |
| UDE | Sensor Indicator Front/rear Parking Assist, Dealer Provisions | — | Reference |
| UDF | Sensor Indicator Front Parking Assist | — | Reference |
| UDG | Display Instrument Trip Odometer, Segmented | — | Reference |
| UDH | Display Instrument Driver Info (one Color Graphic) | — | Reference |
| UDI | Sales Processing Opt Drive Sense Comfort Package | — | Reference |
| UDK | Infotainment Display Color Info Display (cid) 7', Qvga | — | Reference |
| UDL | Infotainment Display Color Info Display (cid) 8', Wvga | — | Reference |
| UDN | Infotainment Display Color Info Display (cid) 7', Wvga | — | Reference |
| UDO | Sales Processing Opt Drive Sense Package | — | Reference |
| UDP | Sensor Indicator Front, Rear, Lateral Parking Assist (advanced Parking Aid) | — | Reference |
| UDQ | Sensor Indicator Ultrasonic Blindspot Detection | — | Reference |
| UDR | Infotainment Display Color Info Display (cid) 4.9' | — | Reference |
| UDT | Infotainment Display Color Info Display (cid) 8', Wvga, Touch Screen | — | Reference |
| UDV | Driver Information Center | 2026 | GM sourced |
| UDY | Infotainment Display Color Info Display (cid) 7', Wvga, Touch Screen | — | Reference |
| UDZ | Display Trip Computer | — | Reference |
| UE0 | OnStar, delete | 2019 | Reference |
| UE1 | OnStar services capable | 2026 | GM sourced |
| UE2 | P, EQUIPMENT, PHONE AND TELEMATIC | 1999 | Provisional |
| UE3 | P, ONS, R, COMMUNICATION SYSTEM, VEHICLE, G.P.S. 3 this code has more than one documented meaning — filter by year | 1997 | GM sourced |
| UE4 | Following Distance Indicator | 2026 | GM sourced |
| UE5 | P, ONS, R, COMMUNICATION SYSTEM, VEHICLE, G.P.S. 5 (MEXICO), 10914 this code has more than one documented meaning — filter by year | — | GM sourced |
| UE6 | Switch,headlamps this code has more than one documented meaning — filter by year | — | Reference |
| UE7 | P, COMMUNICATION EQUIP, TELEVISION, 211 E, 4 | — | GM sourced |
| UE8 | P, CLOCK, ELECTRIC, DIGITAL this code has more than one documented meaning — filter by year | 1984 | GM sourced |
| UE9 | P, COMMUNICATION EQUIP, VEHICLE INFORMATION, 211 E, 4 | — | GM sourced |
| UEA | P, TAL, R, TAIL LAMP, - DELETE this code has more than one documented meaning — filter by year | 1998 | GM sourced |
| UEB | P, SENSOR INDICATOR, OBSTACLE PRESENCE DETECTION, WITH COLLISION, AVOIDANCE | 1999 | GM sourced |
| UEC | P, SENSOR INDICATOR, AUTOMATIC AIR RECIRCULATION | 1998 | GM sourced |
| UED | P, SENSOR INDICATOR, HEAT/MOTION DETECTION - DELETE, 308 E, 1 | — | Provisional |
| UEG | C, PROVISIONS, ELECTRICAL-BODY BUILDER | 1998 | GM sourced |
| UEH | P, PROVISIONS, ELECTRICAL WIRING | 1995 | GM sourced |
| UEJ | C, PROVISIONS, BATTERY POSITIVE AUX FEED this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| UEK | P, SWITCH, HAZARD WARNING this code has more than one documented meaning — filter by year | 1993 | GM sourced |
| UEM | C, ALARM, PARK BRAKE this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| UEN | C, PROVISIONS, TWO WAY RADIO, LH DASH MTD this code has more than one documented meaning — filter by year | 1991 | GM sourced |
| UEP | P, PROVISIONS, JUMP START AID this code has more than one documented meaning — filter by year | 1994 | GM sourced |
| UEQ | C, SWITCH, BATTERY SHUTDOWN, 20124 | — | GM sourced |
| UER | P, EQUIPMENT, TACH & ENG ALARM this code has more than one documented meaning — filter by year | 1996 | GM sourced |
| UES | P, PROVISIONS, EXTERIOR EQUIPMENT, EXPORT this code has more than one documented meaning — filter by year | 1993 | GM sourced |
| UET | In-Vehicle Trailering App this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| UEU | Forward Collision Alert this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| UEV | Communication Equip Automatic Toll Collection | — | Reference |
| UEW | Radio Am/fm Stereo, SD Nav, Cd-rom, Caf, Usb, Rsa (gmna Version) | — | Reference |
| UEX | Communication Equip Remote Data Transfer | — | Reference |
| UEY | Radio Am/fm Stereo, SD Nav, Cd-rom, Caf, Usb, Rsa (europ E Version) | — | Reference |
| UF0 | P, SPR, M, SPEAKER SYSTEM, 13, DELUXE, 10221 | — | Provisional |
| UF1 | P, DISPLAY, TIME, DATE | 1999 | GM sourced |
| UF2 | LED Cargo Area Lighting | 2026 | GM sourced |
| UF3 | High idle switch this code has more than one documented meaning — filter by year | 2026 | GM sourced |
| UF4 | P, LAMP, AUX ALL WEATHER this code has more than one documented meaning — filter by year | 1985 | GM sourced |
| UF5 | P, LAMP, INTR, I/S R/V MIRROR, COURTESY | 1999 | GM sourced |
| UF6 | P, LAMP, INTR, CONSOLE, COURTESY | 1984 | GM sourced |
| UF7 | P, CSR, M, CLUSTER, INST, COOL TEMP, TRIP ODOM, FUEL, CLOCK | 1998 | GM sourced |
| UF8 | P, DISPLAY, TIME, DATE, EXTERNAL TEMP | 1999 | Provisional |
| UF9 | P, DISPLAY, TIME, DATE, EXTERNAL TEMP, RADIO | 1999 | Provisional |
| UFA | Display Outside Temperature | — | Reference |
| UFB | Rear Cross Traffic Braking | 2026 | GM sourced |
| UFD | Infotainment Display Time, External Temp, Radio | — | Reference |
| UFF | Radio Am/fm Stereo, Cd-rom, Caf, Rsa, Music Navigator, Graphics | — | Reference |
| UFG | Rear Cross Traffic Alert | 2026 | GM sourced |
| UFI | Switch Fleet Veh - Lpg Preference Alarm | — | Reference |
| UFJ | Radio Am/fm Stereo, SD Nav, Cd-rom, Caf, Usb, Rsa (laam Version) | — | Reference |
| UFL | Lane Departure Warning | 2026 | GM sourced |
| UFM | Parts Pkg Complete Vehicle Kit, 3 Tank | — | Reference |
| UFN | Radio Am/fm Stereo, Nav, Dvd-rom, Hdd, USB (china) | — | Reference |
| UFP | Parts Pkg Complete Vehicle Kit, 4 Tank | — | Reference |
| UFQ | Sensor Indicator Front, Rear, Lateral-front Parking Assist (semiautoma | — | Reference |
| UFR | P, SENSOR INDICATOR, FRONT & REAR OBSTACLE DETECTION, 20514 E, 4 | — | GM sourced |
| UFS | P, SENSOR INDICATOR, FRONT, REAR, & SIDE OBSTACLE DETECTION, 20514 E, 4 | — | Provisional |
| UFT | Sensor Indicator Side Obstacle Detection | — | Reference |
| UFU | Radio Am/fm Stereo, Single Cd, MP3 (aux In), USB | — | Reference |
| UFV | Radio Am/fm, Dvd Rom &hdd, MP3 (aux In), Usb, Nav | — | Reference |
| UFW | Radio Am/fm Stereo, Sgl Cd, MP3 (aux In), USB | — | Reference |
| UFX | Radio Am/fm, Dvd Rom & Hdd, MP3 (aux In), Usb, Nav | — | Reference |
| UFZ | Radio Am/fm Stereo, SD Nav Touchscreen, Cd-rom, Usb, Bluetooth Phone | — | Reference |
| UG1 | Universal Home Remote | 2026 | GM sourced |
| UG2 | P, OPENER, GARAGE DOOR, UNIVERSAL - DELETE | 1998 | GM sourced |
| UG3 | P, LAMP, INTR, CONSOLE, DUAL READING, 818 | — | GM sourced |
| UG4 | Radio Am/fm/xm, Touchscreen, Connected, Hd, Cd, Aux Jack USB Port | — | Reference |
| UG5 | P, GAGE, FUEL, METHANOL | 1990 | GM sourced |
| UG6 | P, ONS, R, COMMUNICATION SYSTEM, VEHICLE, G.P.S. 2, 211 | — | 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.