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 |
|---|---|---|---|
| P2777 | Inching control signal failure | 20 | Powertrain |
| P2778 | Upshift switch circuit intermittent/erratic | 20 | Powertrain |
| P2779 | Pulse switch S2 | 23 | Powertrain |
| P277E | Kløtsj 'A' uventet mekanisk girfrakobling | 9 | Powertrain |
| P277F | Kløtsj 'B' uventet mekanisk girfrakobling | 9 | Powertrain |
| P2780 | Pulse signal or sensor failure | 22 | Powertrain |
| P2781 | Pulse signal or sensor failure | 22 | Powertrain |
| P2782 | Downshift switch circuit intermittent/erratic | 22 | Powertrain |
| P2783 | Torque converter temperature too high | 24 | Powertrain |
| P2784 | Input/Turbine Speed Sensor A/B Correlation | 25 | Powertrain |
| P2785 | The clutch motor drive circuit temperature is too high | 22 | Powertrain |
| P2786 | Gear shift actuator temperature too high | 23 | Powertrain |
| P2787 | Clutch Temperature Too High | 26 | Powertrain |
| P2788 | Auto shift manual adaptive learning at limit | 28 | Powertrain |
| P2789 | Clutch Adaptive Learning at Limit | 24 | Powertrain |
| P278A | Kick down switch circuit | 22 | Powertrain |
| P278B | Kick down switch circuit range/performance | 23 | Powertrain |
| P278C | Kick down switch circuit low | 21 | Powertrain |
| P278D | Kick down switch circuit high | 21 | Powertrain |
| P278E | Kick down switch circuit intermittent/erratic | 19 | Powertrain |
| P278F | Clutch 'B' Adaptive Learning At Limit | 19 | Powertrain |
| P2790 | Gate select direction circuit | 23 | Powertrain |
| P2791 | Gate select direction circuit low | 23 | Powertrain |
| P2792 | Gate select direction circuit high | 23 | Powertrain |
| P2793 | Gear shift direction circuit | 23 | Powertrain |
| P2794 | Gear shift direction circuit low | 23 | Powertrain |
| P2795 | Gear shift direction circuit high | 22 | Powertrain |
| P2796 | Electric/Auxiliary Transmission Fluid Pump A Control Circuit/Open | 24 | Powertrain |
| P2797 | Electric/Auxiliary Transmission Fluid Pump A Performance/Stuck Off | 28 | Powertrain |
| P2798 | Electromagnetic oil pump (EMOP) control circuit short to ground | 25 | Powertrain |
| P2799 | Electromagnetic oil pump (EMOP) control circuit short to battery (+) or circuit open | 22 | Powertrain |
| P279A | Transfer case gear high incorrect ratio | 21 | Powertrain |
| P279B | Transfer case gear low incorrect ratio | 21 | Powertrain |
| P279C | Transfer case gear neutral incorrect ratio | 21 | Powertrain |
| P279D | Four-wheel drive (4WD) range signal circuit | 21 | Powertrain |
| P279E | Four-wheel drive (4WD) range signal circuit range/performance | 21 | Powertrain |
| P279F | Four-wheel drive (4WD) range signal circuit low | 21 | Powertrain |
| P27A0 | Four-wheel drive (4WD) range signal circuit high | 21 | Powertrain |
| P27A7 | Pressure control solenoid 'A' data incompatible | 12 | Powertrain |
| P27A8 | Pressure control solenoid 'B' data incompatible | 11 | Powertrain |
| P27A9 | Pressure control solenoid 'C' data incompatible | 11 | Powertrain |
| P27AA | Pressure control solenoid 'D' data incompatible | 11 | Powertrain |
| P27AB | Pressure control solenoid 'E' data incompatible | 11 | Powertrain |
| P27AC | Pressure control solenoid 'F' data incompatible | 11 | Powertrain |
| P27AD | Pressure control solenoid 'G' data incompatible | 11 | Powertrain |
| P27AE | Pressure control solenoid 'H' data incompatible | 11 | Powertrain |
| P27AF | Pressure control solenoid 'J' data incompatible | 10 | Powertrain |
| P27B0 | Pressure control solenoid 'K' data incompatible | 10 | Powertrain |
| P27B1 | Intern styrmodul, växellägesval, prestanda | 10 | Powertrain |
| P27B2 | Intern styrmodul, växellägeskontroll, prestanda | 11 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.