Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DBβ LIVE
HOMESERVICE MANUALSCHEVROLET2013SILVERADO 2500 HD LT, 2D CAB CHASSIS, 6.6L ENG VIN 8, RWDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSWIRING DIAGRAMSWIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - DRIVE MOTOR GENERATOR BATTERY CONTROL MODULE TO FUEL PUMP DISABLE MODULECOMPONENT CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) X2 (L9H WITH Y91)
2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWD
Engine Control Module (ECM) X2 (L9H with Y91)
2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWDSECTION Engine Control Module (ECM) X2 (L9H with Y91)
Connector Part Information
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Terminal Part Information
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Engine Control Module (ECM) X2 (L9H with Y91)
| Pin | Wire | Circuit | Function |
|---|---|---|---|
| 1 | - | - | Not Used |
| 2 | 0.35 PU/WH | 6270 | 5-Volt Reference 2 |
| 3 | 0.35 GY | 2701 | 5-Volt Reference 2 |
| 4 | - | - | Not Used |
| 5 | 0.5 BN | 582 | TAC Motor Control - 2 |
| 6 | 0.5 YE | 581 | TAC Motor Control - 1 |
| 7 | - | - | Not Used |
| 8 | 0.5 D-GN/WH | 428 | EVAP Canister Purge Solenoid Control |
| 9-11 | - | - | Not Used |
| 12 | 0.5 GY/WH | 3113 | HO2S Heater Low Control - Bank 1 Sensor 1 |
| 13 | 0.5 L-GN | 3212 | HO2S Heater Low Control - Bank 2 Sensor 1 |
| 14-15 | - | - | Not Used |
| 16 | 0.35 PU | 5284 | Camshaft Actuator Solenoid Control (LY6 or L9H) |
| 17 | 0.5 D-BU/WH | 878 | Fuel Injector 8 Control |
| 18 | 0.5 TN/WH | 845 | Fuel Injector 5 Control |
| 19 | 0.5 YE/BK | 846 | Fuel Injector 6 Control |
| 20 | 0.5 TN | 1744 | Fuel Injector 1 Control |
| 21 | 0.5 YE | 410 | ECT Sensor Signal |
| 22 | 0.5 TN | 2761 | Low Reference |
| 23-25 | - | - | Not Used |
| 26 | 0.8 D-BU | 496 | KS 1 Signal |
| 27 | 0.8 GY | 1716 | KS 1 Signal |
| 28 | - | - | Not Used |
| 29 | 0.8 L-BU | 1876 | KS 2 Signal |
| 30 | 0.8 GY | 2303 | KS 2 Signal |
| 31 | - | - | Not Used |
| 32 | 0.5 GY | 23 | Generator Field Duty Cycle Signal |
| 33 | - | - | Not Used |
| 34 | 0.5 BK | 2755 | Low Reference |
| 35 | 0.35 TN | 2752 | Low Reference |
| 36 | - | - | Not Used |
| 37 | 0.5 L-GN/BK | 1745 | Fuel Injector 2 Control |
| 38 | 0.5 PK/BK | 1746 | Fuel Injector 3 Control |
| 39 | 0.5 L-BU/BK | 844 | Fuel Injector 4 Control |
| 40 | 0.5 OG/BK | 877 | Fuel Injector 7 Control |
| 41 | 0.5 GY/WH | 2705 | 5-Volt Reference 1 |
| 42 | - | - | Not Used |
| 43 | 0.5 GY | 2704 | 5-Volt Reference 1 |
| 44 | 0.35 D-BU | 6259 | 5-Volt Reference 1 |
| 45-49 | - | - | Not Used |
| 50 | 0.35 TN/WH | 331 | Oil Pressure Sensor Signal |
| 51 | - | - | Not Used |
| 52 | 0.35 TN | 2199 | Low Reference (LY6 or L9H) |
| 53 | 0.5 OG/BK | 469 | Low Reference |
| 54-55 | - | - | Not Used |
| 56 | 0.5 TN | 1664 | HO2S Low Signal - Bank 1 Sensor 1 |
| 57 | 0.5 PU/WH | 1665 | HO2S High Signal - Bank 1 Sensor 1 |
| 58 | 0.5 L-GN | 432 | MAP Sensor Signal |
| 59 | 0.5 PU | 1666 | HO2S High Signal - Bank 2 Sensor 1 |
| 60 | 0.5 TN | 1667 | H02S Low Signal - Bank 2 Sensor 1 |
| 61 | 0.5 BN | 25 | Charge Indicator Signal |
| 62 | - | - | Not Used |
| 63 | 0.35 PU | 486 | TP Sensor 2 Signal |
| 64 | 0.35 D-BU/WH | 6265 | CMP Sensor Signal |
| 65 | 0.35 D-GN | 485 | TP Sensor 1 Signal |
| 66 | 0.35 BN | 6266 | Low Reference |
| 67 | - | - | Not Used |
| 68 | 0.35 WH/BK | 6271 | CKP Sensor Signal |
| 69 | 0.35 GY/BK | 6272 | Low Reference |
| 70 | 0.5 PU | 2121 | IC 1 Control |
| 71 | 0.5 PU/WH | 2128 | IC 8 Control |
| 72 | 0.5 OG | 2127 | IC 7 Control |
| 73 | 0.5 OG/WH | 2122 | IC 2 Control |
| 74 | 0.5 L-BU/WH | 2126 | IC 6 Control |
| 75 | 0.5 D-GN | 2125 | IC 5 Control |
| 76 | 0.5 D-GN/WH | 2124 | IC 4 Control |
| 77 | 0.5 L-BU | 2123 | IC 3 Control |
| 78 | 0.5 BN | 2129 | Low Reference |
| 79 | 0.5 BN/WH | 2130 | Low Reference |
| 80 | - | - | Not Used |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.