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 |
|---|---|---|---|
| P1792 | CAN bus - engine coolant | 23 | Powertrain |
| P1793 | Wheel speed signal malfunction | 26 | Powertrain |
| P1794 | Incorrect operation of selector lever | 19 | Powertrain |
| P1795 | implausible signal or value | 23 | Powertrain |
| P1796 | Kickdown switch circuit malfunction | 18 | Powertrain |
| P1797 | SMG: Safety concept, level 2, RAM | 19 | Powertrain |
| P1798 | Output speed sensor 2 circuit Range/performance | 20 | Powertrain |
| P1799 | Multifunction switch (CMF) signal failure | 23 | Powertrain |
| P179A | Magnetventil B Kurzschluss nach Plus oder Unterbrechung | 13 | Powertrain |
| P179B | CAN ECM/Turbocharger Boost Control A Actuator - Invalid Data Received | 10 | Powertrain |
| P179C | Transmission clutch 1 minor slip detected | 12 | Powertrain |
| P179D | Transmission clutch 2 minor slip detected | 10 | Powertrain |
| P179E | Transmission clutch 3 minor slip detected | 10 | Powertrain |
| P179F | Transmission clutch 4 minor slip detected | 9 | Powertrain |
| P17A0 | Key lock control circuit failure | 11 | Powertrain |
| P17A1 | Key lock control circuit failure | 11 | Powertrain |
| P17A2 | Transmission hydraulic failure or mechanical failure | 11 | Powertrain |
| P17A3 | Automatic transmission (gear R) | 11 | Powertrain |
| P17A4 | 4th gear incorrect ratio | 10 | Powertrain |
| P17A5 | Mechanical or hydraulic transmission first gear failure during engine braking | 10 | Powertrain |
| P17A6 | Shift lever failure | 10 | Powertrain |
| P17A7 | Pressure regulator 7 (HIS), shunt | 9 | Powertrain |
| P17A8 | Pressure regulator H control current too low | 10 | Powertrain |
| P17A9 | In D mode, the driving force is reduced | 11 | Powertrain |
| P17AA | In D mode, the drive reduction motor fails. | 11 | Powertrain |
| P17AB | Transmission range control module not programmed | 10 | Powertrain |
| P17AC | Transmission range control module long term memory reset | 10 | Powertrain |
| P17AD | Gear selector valve 2 short to earth | 9 | Powertrain |
| P17AE | Gear selector valve 2 short to positive | 9 | Powertrain |
| P17AF | Gear selector valve 2 electrical fault | 9 | Powertrain |
| P17B0 | Gear selector valve 3 open circuit | 10 | Powertrain |
| P17B1 | Gear selector valve 3 short to earth | 10 | Powertrain |
| P17B2 | Gear selector valve 3 short to positive | 10 | Powertrain |
| P17B3 | Gear selector valve 3 electrical fault | 10 | Powertrain |
| P17B4 | Gear selector valve 4 open circuit | 11 | Powertrain |
| P17B5 | Gear selector valve 4 short to earth | 11 | Powertrain |
| P17B6 | Gear selector valve 4 short to positive | 9 | Powertrain |
| P17B7 | Gear selector valve 4 electrical fault | 10 | Powertrain |
| P17B8 | Gear recognition sensor 1 implausible signal | 11 | Powertrain |
| P17B9 | Gear recognition sensor 1 signal too small | 10 | Powertrain |
| P17BA | Gear recognition sensor 1 signal too large | 11 | Powertrain |
| P17BB | Fault: ECU internal | 12 | Powertrain |
| P17BC | Fault: ECU internal | 11 | Powertrain |
| P17BD | Gear recognition sensor 2 signal too large | 10 | Powertrain |
| P17BF | Error - Hydraulic pump | 8 | Powertrain |
| P17C4 | Selector lever position display unit defective | 8 | Powertrain |
| P17C5 | Selector lever implausible signal | 8 | Powertrain |
| P17C6 | Intermediate Speed Sensor 2 Direction Not Plausible - Forward | 7 | Powertrain |
| P17C7 | Intermediate speed sensor 2 direction not plausible - reverse | 9 | Powertrain |
| P17C8 | Transmission range control module range motor command performance - protection mode active | 8 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.