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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) X1 (Diesel)
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Engine Control Module (ECM) X1 (Diesel)

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: 13649839
  • Service Connector: 13574946
  • Description: 73-Way F MX123 34566 Series (BU)
Terminal Part Information
  • Pins: 1-3, 5-7, 9-11, 14-20, 22, 25-31, 33-36, 38-46, 48-59, 61-63, 65-72
  • 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: 1-2, 6, 50, 53, 70 - K/K
  • Core/Insulation Crimp: Pins: 3, 5, 7, 9, 14-20, 22, 25-31, 33-36, 38-46, 48-49, 51-52, 54-59, 61-63, 65-69, 71-72 - J/J
  • 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) X1 (Diesel)

Pin Wire Circuit Function
1 0.8 BN/WH 3100 DEF Dosing Valve Low Control
2 0.8 BN 3099 DEF Dosing Valve High Control
3 0.5 D-BU 3105 DEF Smart Pump Control
4 - - Not Available
5 0.5 YE/BK 625 Starter Enable Relay Control
6 0.8 D-GN 3101 DEF Reverting Valve High Control
7 0.5 BN/WH 6783 Low Reference
8 - - Not Available
9 0.5 L-BU/WH 6311 Cruise/ETC/TCC Brake Signal
10 0.5 TN/WH 1695 Four Wheel Drive Wheel Lock Indicator (NQG)
11 0.5 GY/BK 1694 Four Wheel Drive Low Signal (NQG)
12-13 - - Not Available
14 0.5 GY 2365 5 Volt Reference
15 0.5 GY/BK 2931 Low Reference
16 0.5 L-BU/WH 6288 Low Reference
17 0.5 BN/WH 419 Check Engine Indicator Control
18 0.5 PU 2927 Hydrocarbon Injector Low Control
19 0.5 WH/BK 2366 Cooling Fan Control Relay Speed Signal
20 0.5 D-BU 507 Wait To Start Indicator Control
21 - - Not Available
22 0.5 TN 3657 Low Reference
23-24 - - Not Available
25 0.5 OG/BK 1786 Transmission Park/Neutral Signal
26 0.5 D-BU 5985 Accessory Wakeup Serial Data
27 0.5 TN 3661 Low Reference
28 0.5 TN/BK 6049 Low Reference
29 0.5 BN 3108 DEF Pressure Sensor Signal
30 0.5 GY 3106 5 Volt Reference
31 0.5 TN 3107 Low Reference
32 - - Not Available
33 0.5 D-BU 2926 Hydrocarbon Injector High Control
34 0.5 D-GN/WH 459 A/C Compressor Clutch Relay Control
35 0.5 TN 3104 Low Reference
36 0.5 TN 5514 Low Reference
37 - - Not Available
38 0.5 L-BU 5377 Exhaust Gas Temperature Sensor 2 Signal
39 0.5 L-BU 1162 Accelerator Pedal Position Signal 2
40 0.5 TN/BK 6289 Induction Air Temperature Sensor Signal
41 0.5 D-BU 6053 Exhaust Pressure Sensor Signal 1
42 0.5 WH/BK 1164 5 Volt Reference
43 0.5 GY 6054 5 Volt Reference
44 0.5 YE 6055 Low Reference
45 0.5 L-GN 7494 High Speed GMLAN Serial Data (-) (3)
46 0.5 TN 2501 High Speed GMLAN Serial Data (-) (1)
47 - - Not Available
48 0.5 PK 439 Run/Crank Ignition 1 Voltage
49 0.5 YE 492 Mass Air Flow Sensor Signal
50 0.8 BN 25 Charge Indicator Control
51 0.5 PU 1272 Low Reference
52 0.5 L-GN/BK 822 Vehicle Speed Sensor Signal (except NQF or NQG)
53 0.8 BK 3102 DEF Reverting Valve Low Control
54 0.5 GY 3103 DEF Smart Pump Supply Voltage
55 0.5 BN 1271 Low Reference
56 0.5 D-BU/WH 3660 Exhaust Gas Temperature Sensor 4 Signal
57 0.5 L-GN 5378 Exhaust Gas Temperature Sensor 3 Signal
58 0.5 PU 1589 Primary Fuel Level Sensor Signal
59 0.5 OG/BK 380 A/C Refrigerant Pressure Sensor Signal
60 - - Not Available
61 0.5 D-BU 1161 Accelerator Pedal Position Signal 1
62 0.5 TN 1274 5 Volt Reference
63 0.5 GY 2700 5 Volt Reference
64 - - Not Available
65 0.5 D-GN 7493 High Speed GMLAN Serial Data (+) (3)
66 0.5 TN/BK 2500 High Speed GMLAN Serial Data (+) (1)
67 0.5 RD/WH 440 Battery Positive Voltage
68 0.5 YE 5991 Powertrain Relay Coil Control
69 0.5 D-BU 2364 Cooling Fan Speed Signal
70 0.8 GY 23 Generator Field Duty Cycle Signal
71 0.5 BN/WH 6141 Low Reference
72 0.5 OG/BK 6399 Replicated TOS Signal (except NQF or NQG)
73 3 PK 1439 Run/Crank Ignition 1 Voltage
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