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 |
|---|---|---|---|
| P2680 | Coolant degassing valve control circuit high | 19 | Powertrain |
| P2681 | Engine Coolant Bypass Valve A Control Circuit/Open | 29 | Powertrain |
| P2682 | Engine Coolant Bypass Valve A Control Circuit Low | 28 | Powertrain |
| P2683 | Engine Coolant Bypass Valve A Control Circuit High | 27 | Powertrain |
| P2684 | Oil level sensor signal failure | 24 | Powertrain |
| P2685 | Actuator Supply Voltage C Circuit Low | 26 | Powertrain |
| P2686 | Actuator Supply Voltage C Circuit High | 26 | Powertrain |
| P2687 | Fuel supply heater control circuit/open | 24 | Powertrain |
| P2688 | Fuel supply heater control circuit low | 23 | Powertrain |
| P2689 | Fuel supply heater control circuit high | 23 | Powertrain |
| P268A | Fuel injector calibration not learned/programmed | 26 | Powertrain |
| P268B | High pressure fuel pump calibration not learned/programmed | 18 | Powertrain |
| P268C | Cylinder 1 injector data incompatible | 27 | Powertrain |
| P268D | Cylinder 2 injector data incompatible | 27 | Powertrain |
| P268E | Cylinder 3 injector data incompatible | 27 | Powertrain |
| P268F | Cylinder 4 injector data incompatible | 27 | Powertrain |
| P2690 | Cylinder 5 injector data incompatible | 22 | Powertrain |
| P2691 | Cylinder 6 injector data incompatible | 22 | Powertrain |
| P2692 | Cylinder 7 injector data incompatible | 21 | Powertrain |
| P2693 | Cylinder 8 injector data incompatible | 21 | Powertrain |
| P2694 | Cylinder 9 injector data incompatible | 18 | Powertrain |
| P2695 | Cylinder 10 injector data incompatible | 18 | Powertrain |
| P2696 | Injector Data Incompatible | 23 | Powertrain |
| P2697 | Exhaust aftertreatment fuel injector 'A' circuit/open | 22 | Powertrain |
| P2698 | Exhaust aftertreatment fuel injector 'A' performance | 21 | Powertrain |
| P2699 | Exhaust aftertreatment fuel injector 'A' circuit low | 20 | Powertrain |
| P269A | Exhaust aftertreatment fuel injector 'A' circuit high | 21 | Powertrain |
| P269B | Exhaust aftertreatment glow plug control circuit/open | 18 | Powertrain |
| P269C | Exhaust aftertreatment glow plug control performance | 18 | Powertrain |
| P269D | Exhaust aftertreatment glow plug control circuit low | 19 | Powertrain |
| P269E | Exhaust aftertreatment glow plug control circuit high | 19 | Powertrain |
| P269F | Exhaust aftertreatment glow plug circuit/open | 19 | Powertrain |
| P26A0 | Exhaust aftertreatment glow plug performance | 20 | Powertrain |
| P26A1 | Exhaust aftertreatment glow plug circuit low | 18 | Powertrain |
| P26A2 | Exhaust aftertreatment glow plug circuit high | 18 | Powertrain |
| P26A3 | Engine coolant bypass valve 'A' range/performance | 15 | Powertrain |
| P26A4 | Engine coolant bypass valve 'A' position sensor circuit | 10 | Powertrain |
| P26A5 | Engine coolant bypass valve 'A' position sensor circuit range/performance | 12 | Powertrain |
| P26A6 | Engine coolant bypass valve 'A' position sensor circuit low | 14 | Powertrain |
| P26A7 | Engine coolant bypass valve 'A' position sensor circuit high | 14 | Powertrain |
| P26A9 | Engine coolant bypass valve 'A' position sensor stop/minimum stop performance | 10 | Powertrain |
| P26AD | Engine coolant bypass valve 'B' control circuit low | 11 | Powertrain |
| P26AE | Engine coolant bypass valve 'B' control circuit high | 11 | Powertrain |
| P26B3 | Fuel shutoff valve 'A' control circuit performance/stuck off | 10 | Powertrain |
| P26B7 | Engine coolant bypass valve 'C' control circuit/open | 10 | Powertrain |
| P26B8 | Engine coolant bypass valve 'C' control circuit low | 10 | Powertrain |
| P26B9 | Engine coolant bypass valve 'C' control circuit high | 10 | Powertrain |
| P26BA | Engine coolant bypass valve 'C' stuck/open | 10 | Powertrain |
| P26BB | Engine coolant bypass valve 'C' range/performance | 10 | Powertrain |
| P26BC | Engine coolant bypass valve 'C' stuck closed | 10 | Powertrain |
Some brand data is extracted from diagnostic files and may contain manufacturer-specific wording. General SAE J2012 descriptions are used where available.