GMC fault codes
Coverage shown is GM data: 17,703 codes · 2,212 vehicle records · 180 ECU records · 10,756 live-data parameters.
GMC shares fault-code data with GM. Data may not cover GMC-specific systems.
Codes 17,703
| Code | Description | Brands | System |
|---|---|---|---|
| U1238 | Loss of serial communications for class 2 devices | 8 | Network |
| U1239 | Loss of serial communications for class 2 devices | 8 | Network |
| U1240 | Loss of serial communications for class 2 devices | 11 | Network |
| U1241 | Loss of serial communications for class 2 devices | 9 | Network |
| U1242 | Loss of serial communications for class 2 devices | 8 | Network |
| U1243 | Loss of serial communications for class 2 devices | 9 | Network |
| U1244 | Loss of serial communications for class 2 devices | 10 | Network |
| U1245 | Loss of serial communications for class 2 devices | 8 | Network |
| U1246 | Loss of serial communications for class 2 devices | 8 | Network |
| U1247 | Loss of serial communications for class 2 devices | 8 | Network |
| U1248 | Loss of serial communications for class 2 devices | 8 | Network |
| U1249 | Loss of serial communications for class 2 devices | 5 | Network |
| U1250 | Loss of serial communications for class 2 devices | 5 | Network |
| U1251 | Loss of serial communications for class 2 devices | 5 | Network |
| U1252 | Loss of serial communications for class 2 devices | 5 | Network |
| U1253 | Loss of serial communications for class 2 devices | 10 | Network |
| U1254 | Loss of serial communications for class 2 devices | 8 | Network |
| U1255 | Class 2 Communication Malfunction | 10 | Network |
| U1258 | Satellite Antenna Circuit | 10 | Network |
| U1262 | J1850 SCP Comm Bus Fault - Instr Clstr | 13 | Network |
| U1263 | Universal Serial Bus (USB) Circuit | 10 | Network |
| U1265 | Motor posisi flap suhu Kiri | 9 | Network |
| U12AA | System Configuration Error | 8 | Network |
| U12AB | Antenna Signal Circuit | 8 | Network |
| U12AC | Control Module Overtemperature | 8 | Network |
| U12AD | Control Module Overtemperature | 8 | Network |
| U12AE | F-CAN Malfunction (ICM - Battery ECH) | 7 | Network |
| U12AF | Control Module Overtemperature | 10 | Network |
| U12B0 | Supply Voltage Circuit Low Voltage | 9 | Network |
| U12B1 | Supply Voltage Circuit High Voltage | 9 | Network |
| U12B2 | Digital Audio Broadcast Antenna Circuit | 9 | Network |
| U12D6 | Traction control (anti-slip regulation) failure | 7 | Network |
| U12D9 | Communication error with network voltage maintenance device ECU | 7 | Network |
| U1300 | Class 2 data link low | 21 | Network |
| U1301 | Class 2 data link high | 22 | Network |
| U1302 | Data Length Error | 20 | Network |
| U1303 | Programming mode active message not received | 23 | Network |
| U1304 | CAN bus no communication with seat interface module | 19 | Network |
| U1305 | No communication with the steering angle sensor (SAS) | 22 | Network |
| U1307 | Lost communication with trailer interface control module | 19 | Network |
| U1308 | No communication with engine control unit | 20 | Network |
| U1309 | No communication with A/T ECU | 21 | Network |
| U130B | RR CAMERA COMM ERROR | 6 | Network |
| U130C | No description available | 6 | Network |
| U130D | No description available | 4 | Network |
| U130E | No description available | 4 | Network |
| U130F | No description available | 3 | Network |
| U1310 | Automatic transmission electrical control failure | 21 | Network |
| U1311 | Data Length Error | 20 | Network |
| U1312 | Data Length Error | 19 | Network |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.