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Home >> GMC >> 2014 >> Yukon Denali, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Wiring Systems And Power Management - Component Connector End Views - Drive Motor Battery Control Module X4 To Fuel Pump Disable Control Module (LC8)) >> Component Connector End Views >> Engine Control Module (ECM) X3 (LGH or LML)
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Engine Control Module (ECM) X3 (LGH or LML)

WARNING: This page is about a different car, the 2014 GMC Sierra 3500 HD, 2014 GMC Sierra 2500 HD, 2014 Chevrolet Silverado 3500 HD, and 2014 Chevrolet Silverado 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
GM1968294Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine Chassis
  • OEM Connector: 12603597
  • Service Connector: 13574948
  • Description: 73-Way F MX123 34566 Series (GY)
Terminal Part Information
  • Pins: 2--7, 9-16, 18-21, 24-25, 27-32, 36-38, 40, 44, 46, 48-52, 54-62, 64-72
  • Terminated Lead: 13575575
  • Release Tool: J-38125-213
  • Diagnostic Test Probe:J-35616-64B (L-BU)
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins: 2-7, 9-16, 18-21, 24-25, 27-32, 36-38, 40, 44, 46, 48, 54-55, 58-62, 64-68 - J/J
  • Core/Insulation Crimp: Pins: 49-52, 56-57, 69-72 - K/K
  • Pin 73
  • Terminated Lead: Pending
  • Release Tool: J-38125-11A
  • Diagnostic Test Probe: J-35616-35 (VT)
  • Terminal/Tray: 7116-4152-02/9
  • Core/Insulation Crimp: A/5
Engine Control Module (ECM) X3 (LGH or LML)

Pin Wire Circuit Function
1 - - Not Available
2 0.5 BU/YE 6861 Water In Fuel Sensor Signal
3 0.5 L-BU/WH 1937 Secondary Fuel Level Sensor Signal (N2N)
4 0.5 TN/WH 331 Oil Pressure Sensor Signal
5 0.5 YE 5361 Brake Apply Sensor Signal
6 0.5 PU/WH 7584 Exhaust Gas Recirculation Temperature Sensor 1 Supply Voltage
7 0.5 D-BU 7583 Exhaust Gas Recirculation Temperature Sensor 2 Supply Voltage
8 - - Not Available
9 0.5 BN/WH 5763 Exhaust Gas Recirculation Valve Sensor Signal
10 0.5 YE 5947 Variable Nozzle Turbo Position Sensor Signal
11 0.5 YE 1578 Fuel Temperature Signal
12 0.5 BN 3681 Charge Air Cooler Outlet Temperature Sensor Signal
13 0.5 TN 3680 Charge Air Cooler Outlet Temperature Sensor Return
14 0.5 TN 2917 5 Volt Reference
15 0.5 WH 5359 Brake Apply Sensor Supply Voltage
16 0.5 GY 2704 5 Volt Reference
17 - - Not Available
18 0.5 D-BU 5277 Exhaust Gas Temperature Sensor 1 Signal
19 0.5 D-GN 485 Throttle Position Sensor Signal 1
20 0.5 YE 2918 Fuel Rail Pressure Sensor Signal
21 0.5 L-GN 432 Manifold Absolute Pressure Sensor Signal
22-23 - - Not Available
24 0.5 YE 410 Engine Coolant Temperature Sensor Signal
25 0.5 D-GN/WH 3654 EGR Cooler Bypass Position Sensor Signal (LML)
26 - - Not Available
27 0.5 BN/GY 7072 Sensor Fuel Temperature 1 Signal
28 0.5 D-GN 3683 Charge Air Cooler Inlet Temperature Sensor Signal
29 0.5 TN/BK 3682 Charge Air Cooler Inlet Temperature Sensor Return
30 0.5 GY 2705 5 Volt Reference
31 0.5 D-BU 6259 5 Volt Reference
32 0.5 GY 2701 5 Volt Reference
33-35 - - Not Available
36 0.5 OG/BK 2919 Low Reference
37 0.5 OG/BK 469 Low Reference
38 0.5 BN 5360 Brake Apply Sensor Low Reference
39 - - Not Available
40 0.5 TN 2761 Low Reference
41 0.5 L-BU 7564 Humidity Sensor Signal
42-43 - - Not Available
44 0.5 GY/BK 5765 Fuel Filter Pressure Switch Signal
45 - - Not Available
46 0.5 BN/WH 7073 Sensor Fuel Temperature 1 Return
47 - - Not Available
48 0.5 BN 6062 Low Reference
49 0.8 GY/WH 4908 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 8
50 0.8 D-BU/WH 4902 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 2
51 0.8 D-BU 4802 Direct Fuel Injector (DFI) High Voltage Control Cylinder 2
52 0.8 L-BU 4805 Direct Fuel Injector (DFI) High Voltage Control Cylinder 5
53 - - Not Available
54 0.5 L-GN/BK 5746 Exhaust Gas Recirculation Valve Motor Low Signal
55 0.5 OG/BK 5764 Exhaust Gas Recirculation Valve Motor High Signal
56 0.8 BN 582 Throttle Actuator Control Close
57 0.8 YE 581 Throttle Actuator Control Open
58 0.5 OG/BK 3656 EGR Cooler Bypass Motor Close Control (LML)
59 0.5 L-GN 3655 EGR Cooler Bypass Motor Open Control (LML)
60 0.5 GY/BK 6272 Low Reference
61 0.5 WH/BK 6271 CKP Sensor Signal
62 0.5 D-GN 485 Throttle Position Sensor Signal 1
63 - - Not Available
64 0.5 D-GN/WH 6142 Power Take Off Engine Shutdown Signal (PTO)
65 0.5 D-BU/WH 6265 CMP Sensor Signal
66 0.5 BN 6266 Low Reference
67 0.5 BN 6274 Low Reference
68 0.5 WH 6275 Low Reference
69 0.8 D-GN/WH 4903 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 3
70 0.8 L-GN/WH 4905 Direct Fuel Injector (DFI) High Voltage Supply Cylinder 5
71 0.8 D-GN 4803 Direct Fuel Injector (DFI) High Voltage Control Cylinder 3
72 0.8 GY 4808 Direct Fuel Injector (DFI) High Voltage Control Cylinder 8
73 3 BK/WH 451 Ground
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