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HOMESERVICE MANUALSCHEVROLET2013SILVERADO 2500 HD LT, 2D CAB CHASSIS, 6.6L ENG VIN 8, RWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2269 (WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS - ELECTRONIC COMPASS MODULE TO MEMORY SEAT MODULE (X4))COMPONENT CONNECTOR END VIEWSENGINE CONTROL MODULE (ECM) X2 (EXCEPT HP2)
2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWD

Engine Control Module (ECM) X2 (except HP2)

2013 Chevrolet Silverado 2500 HD LT, 2D Cab Chassis, 6.6L Eng VIN 8, RWDSECTION Engine Control Module (ECM) X2 (except HP2)
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GM1830236Courtesy of
Connector Part Information
  • Harness: Engine
  • OEM: 13528613 (L94, L9H or LC9)
  • OEM: 13536319 (L20 or L96)
  • Service: 19115670
  • Description: 80-Way F MX123 34566 Series (GY), Sealed
Terminal Part Information
  • Pins: 2, 3, 16, 35, 44, 52, 63-66, 68, 69
  • Terminated Lead: Service by Harness - See Part Catalog
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Pins: 5, 6, 8-14, 17-22, 26, 27, 29, 30, 32, 34, 37-41, 43, 50, 53, 56-61, 70-79
  • Terminated Lead: Service by Harness - See Part Catalog
  • Release Tool: J-38125-213
  • Diagnostic Test Probe: J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins 5, 6, 8-14, 17-22, 32, 34, 37-41, 43, 50, 53, 56-61, 70-79 - J/J
  • Core/Insulation Crimp: Pins 26, 27, 29, 30 - K/K
Engine Control Module (ECM) X2 (except HP2)

Pin Wire Circuit Function
1 - - Not Available
2 0.35 PU/WH 6270 5-Volt Reference 2
3 0.35 GY 2701 5-Volt Reference 2
4 - - Not Available
5 0.5 BN 582 TAC Motor Control - 2
6 0.5 YE 581 TAC Motor Control - 1
7 - - Not Available
8 0.5 D-GN/WH 428 EVAP Canister Purge Solenoid Control
9 0.5 GY 5493 Cylinder Shutoff Solenoid Control (3) (L94, LC9 or LMG)
10 0.5 D-BU 5491 Cylinder Shutoff Solenoid Control (1) (L94, LC9 or LMG)
11 0.5 OG 5494 Cylinder Shutoff Solenoid Control (4) (L94, LC9 or LMG)
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 0.5 L-GN/BK 5492 Cylinder Shutoff Solenoid Control (2) (L94, LC9 or LMG)
15 - - Not Available
16 0.35 PU 5284 Camshaft Actuator Solenoid Control
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 Engine Coolant Temperature (ECT) Sensor Signal
22 0.5 TN 2761 Low Reference
23-25 - - Not Available
26 0.8 D-BU 496 Knock Sensor 1 Signal
27 0.8 GY 1716 Low Reference
28 - - Not Available
29 0.8 L-BU 1876 Knock Sensor 2 Signal
30 0.8 GY 2303 Low Reference
31 - - Not Available
32 0.5 GY 23 Generator Field Duty Cycle Signal
33 - - Not Available
34 0.5 BK 2755 Low Reference
35 0.35 TN 2752 Low Reference
36 - - Not Available
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 2705 5-Volt Reference 1
42 - - Not Available
43 0.5 GY 2704 5-Volt Reference 1
44 0.35 D-BU 6259 5-Volt Reference 1
45-49 - - Not Available
50 0.5 TN/WH 331 Oil Pressure Sensor Signal
51 - - Not Available
52 0.35 TN 2199 Low Reference (6.0L)
53 0.5 OG/BK 469 Low Reference
54-55 - - Not Available
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 Manifold Absolute Pressure (MAP) Sensor Signal
59 0.5 PU 1666 HO2S High Signal - Bank 2 Sensor 1
60 0.5 TN 1667 HO2S Low Signal - Bank 2 Sensor 1
61 0.5 BN 25 Charge Indicator Control/Charge Indicator Signal
62 - - Not Available
63 0.35 PU 486 Throttle Position Sensor 2 Signal
64 0.35 D-BU/WH 6265 CMP Sensor Signal
65 0.35 D-GN 485 Throttle Position Sensor 1 Signal
66 0.35 BN 6266 Low Reference
67 - - Not Available
68 0.35 WH/BK 6271 Crankshaft Position (CKP) Sensor Signal
69 0.35 GY/BK 6272 Low Reference
70 0.5 PU 2121 Ignition Coil 1 Control
71 0.5 PU/WH 2128 Ignition Coil 8 Control
72 0.5 OG 2127 Ignition Coil 7 Control
73 0.5 OG/WH 2122 Ignition Coil 2 Control
74 0.5 L-BU/WH 2126 Ignition Coil 6 Control
75 0.5 D-GN 2125 Ignition Coil 5 Control
76 0.5 D-GN/WH 2124 Ignition Coil 4 Control
77 0.5 L-BU 2123 Ignition Coil 3 Control
78 0.5 BN 2129 Low Reference
79 0.5 BN/WH 2130 Low Reference
80 - - Not Available
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.