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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 (L96)
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Engine Control Module (ECM) X1 (L96)

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.
GM784851Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness: Engine
  • OEM: 13510837
  • Service: 88988373
  • Description: 56-Way F MX123 Series (BU)
Terminal Part Information
  • Pins: 2, 10, 12-14, 16, 24, 26, 28, 30, 34, 38, 40, 50, 52
  • Terminal/Tray: 33467-0003/23
  • Core/Insulation Crimp: H/H
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
  • Pins: 3-5, 11, 18-20, 25, 27, 29, 31, 33, 39, 43, 45, 47, 53, 56
  • Terminal/Tray: 33467-0005/23
  • Core/Insulation Crimp: Pins: 3-5, 11, 18-20, 25, 27, 29, 31, 33, 39, 43, 45, 47, 56 - J/J
  • Core/Insulation Crimp: Pins: 53 - K/K
  • Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)
Engine Control Module (ECM) X1 (L96)

Pin Wire Circuit Function
1 - - Not Available
2 0.35 L-BU 1162 APP Sensor 2 Signal
3 0.5 YE 492 MAF Sensor Signal
4 0.5 GY/BK 1694 4WD Low Signal (NQG)
5 0.5 TN/WH 1695 Axle Switch Signal (NQG)
6-9 - - Not Available
10 0.35 D-BU 1161 APP Sensor 1 Signal
11 0.5 YE/WH 3200 Throttle Inlet Absolute Pressure Sensor Signal
12 0.35 OG/BK 380 A/C Refrigerant Pressure Sensor Signal (C67 or CJ2)
13 0.35 TN 5514 Low Reference
14 0.35 TN 1465 Fuel Pump Relay Control - Secondary
15 - - Not Available
16 0.35 TN 1274 5-Volt Reference 3
17 - - Not Available
18 0.5 D-BU 5985 Accessory Wakeup Serial Data
19 0.5 PK 439 Ignition 1 Voltage
20 0.5 RD/WH 440 Battery Positive Voltage
21-23 - - Not Available
24 0.35 WH/BK 1164 5-Volt Reference 4
25 0.5 GY/WH 3201 5-Volt Reference 1
26 0.35 GY/WH 2700 5-Volt Reference 1
27 0.5 YE/BK 625 Starter Enable Relay Control
28 0.35 D-GN/WH 465 Fuel Pump Relay Control - Primary
29 0.5 TN/BK 2500 High Speed GMLAN Serial Data Bus (+)
30 0.35 PU 1272 Low Reference
31 0.5 TN 2760 Low Reference
32 - - Not Available
33 0.5 L-BU/WH 6311 Brake Switch Signal
34 0.35 OG/BK 1786 Park/Neutral Signal
35-37 - - Not Available
38 0.35 BN 1271 Low Reference
39 0.5 TN/WH 3202 Low Reference
40 0.35 YE 5991 Powertrain Relay Coil Control
41-42 - - Not Available
43 0.5 TN 2501 High Speed GMLAN Serial Data Bus (-)
44 - - Not Available
45 0.5 TN/BK 472 IAT Sensor Signal
46 - - Not Available
47 0.5 BN 25 Charge Indicator Signal
48-49 - - Not Available
50 0.35 YE/BK 1827 Vehicle Speed Signal
51 - - Not Available
52 0.35 BN/WH 419 MIL Control
53 0.8 D-GN/WH 459 A/C Compressor Clutch Relay Control (C67 or CJ2)
54-55 - - Not Available
56 0.5 WH 1310 EVAP Canister Vent Solenoid Control
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