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Home >> GMC >> 2021 >> Yukon AT4 >> Repair and Diagnosis >> Electrical >> Wiring Diagrams >> Electrical Center Identification Views (X50B - X51AX) >> Electrical Center Identification Views >> X50UA Accessory Wiring Junction Block - Underhood (LM2)

X50UA Accessory Wiring Junction Block - Underhood (LM2)

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Connector Part Information
  • Harness Type: Engine
  • OEM Connector: 35209870
  • Service Connector: Service by Component Assembly -
  • Description: Wire Entry Fuse Block
Terminal Part Information

Terminal Type ID Terminated Lead Diagnostic Test Probe Terminal Removal Tool
I 13327158 J-35616-42 (RD) J-38125-215A
II 13327178 J-35616-43 (RD) J-38125-215A
III 13575364 J-35616-5 (PU) J-38125-36
IV 13582244 J-35616-42 (RD) J-38125-215A
V Not required J-35616-22 (RD) No Tool Required
Pin Size Color Circuit Function Terminal Type ID Option
4 0.5 GN / BU 3889 Powertrain Sensor Bus Relay Control III -
5 1 VT / GN 4320 Powertrain Sensor Bus Enable III -
6 0.5 BU 3017 Fuel Heater Relay 1 Control I -
7 0.5 VT / BU 7078 Powertrain Main Relay Fused Control I -
15 2.5 BN / YE 2996 Fuel Heater Control 1 IV -
19 1 VT / BU 3674 NOx Sensor 1 Control III -
20 0.5 BK 6550 Ground III -
21 2.5 RD / WH 5440 Battery Positive Voltage IV -
26 10 RD / GY 7040 Battery Positive Voltage V -
31 2.5 RD / WH 5440 Battery Positive Voltage II -
33 1.5 RD / BN 5940 Battery Positive Voltage III -
34 1 VT / BU 3674 NOx Sensor 1 Control III -