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 |
|---|---|---|---|
| B1258 | Passenger seatbelt pretensioner short to ground | 13 | Body |
| B1259 | Antenna ground circuit malfunction | 12 | Body |
| B125A | Rear Fan Control Switch Module | 9 | Body |
| B125B | Air Distribution Damper 'B' Motor | 8 | Body |
| B125C | Radio Mute | 8 | Body |
| B125D | Ignition Run LED | 9 | Body |
| B125E | Digital Audio Broadcast Antenna Circuit | 8 | Body |
| B125F | Center Instrument Panel Speaker Motor | 8 | Body |
| B1260 | Confirmation button on the lower right button of the centralized control steering wheel is faulty | 17 | Body |
| B1261 | ESCAPE button fault | 16 | Body |
| B1262 | Driver Side Airbag Short to Ground | 14 | Body |
| B1263 | MODE button fault | 15 | Body |
| B1264 | Confirmation button fault of the lower left knob of the centralized control steering wheel | 14 | Body |
| B1265 | Driver's side airbag resistance is high | 13 | Body |
| B1266 | Speed setting increase button fault | 14 | Body |
| B1267 | Speed setting reduction button fault | 14 | Body |
| B1268 | Cruise control/speed limiter standby button fault | 14 | Body |
| B1269 | Convertible/Folding Top Fully Up Position Switch | 13 | Body |
| B126A | Drivers Door Interior Lock Switch | 10 | Body |
| B126B | Window Open Position Switch | 10 | Body |
| B126C | Deck Lid/Boot/Trunk Key Cylinder Switch | 7 | Body |
| B126D | Convertible/Folding Top Fully Down Position Switch | 5 | Body |
| B126F | Left Rear Window Fully Down Feedback | 8 | Body |
| B1270 | High Mounted Stop Lamp | 13 | Body |
| B1271 | Speed limiter activation button fault | 15 | Body |
| B1272 | Cruise control activation button fault | 15 | Body |
| B1273 | Restore memory speed button fault | 14 | Body |
| B1274 | Speed limiter/cruise control switch failure | 14 | Body |
| B1275 | The cruise control/speed limiter limit status in the Built-in System Interface (BSI) and the engine ECU are inconsistent | 16 | Body |
| B1276 | Self-cruise control function speed setting +/- button failure | 16 | Body |
| B1277 | Fuel filler cap sensor failure | 15 | Body |
| B1278 | Fuel gauge failure | 16 | Body |
| B1279 | Self-cruise control function deactivation/reactivation button failure | 16 | Body |
| B127A | Self-cruise control and cruise control function selection button failure | 9 | Body |
| B127B | Self-cruise control function OFF button failure | 9 | Body |
| B127C | Self-cruise control function vehicle distance alarm +/- button failure | 9 | Body |
| B127D | Ambient Lighting Zone 3 Output Red LED | 8 | Body |
| B127E | Ambient Lighting Zone 1 Output Green LED | 7 | Body |
| B127F | Ambient Lighting Zone 2 Output Green LED | 9 | Body |
| B1280 | Front wiper high-speed output control circuit voltage is low | 19 | Body |
| B1281 | FM composite signal circuit | 16 | Body |
| B1282 | Ambience lighting zone 2 - Output blue LED | 16 | Body |
| B1283 | Front washing output control circuit voltage is low | 16 | Body |
| B1284 | Front washing output control circuit voltage is high | 17 | Body |
| B1285 | Electric rear defrost circuit low | 15 | Body |
| B1286 | Electric rear defrost circuit high | 8 | Body |
| B1287 | Horn output control circuit voltage is high | 12 | Body |
| B1288 | Rear defrost output control circuit is open | 12 | Body |
| B1289 | Video input E | 13 | Body |
| B128A | Mono Audio Signal Circuit | 8 | Body |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.