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HOMESERVICE MANUALSGMC2024SIERRA 2500 HD DENALI ULTIMATEREPAIR AND DIAGNOSISELECTRICALWIRING DIAGRAMSCOMPONENT CONNECTOR END VIEWS (K20 - K44)COMPONENT CONNECTOR END VIEWSK20 ENGINE CONTROL MODULE X2 (L5P)
2024 GMC Sierra 2500 HD Denali Ultimate

K20 Engine Control Module X2 (L5P)

2024 GMC Sierra 2500 HD Denali UltimateSECTION K20 Engine Control Module X2 (L5P)
GM6166536Courtesy of GENERAL MOTORS COMPANY
Connector Part Information
  • Harness Type: Engine Wiring Harness
  • OEM Connector: 13552796
  • Service Connector: 85079959
  • Description: 118-Way F 0.5, 1.2 MXGENV Series, Sealed (BK with BK Terminal Position Assurance)
Terminal Part Information

Terminal Type ID Terminated Lead Diagnostic Test Probe Terminal Removal Tool
I 85079962 EL-35616-58 (BK) EL-38125-560A
II 85079963 J-35616-12 (BU) J-38125-215A
Pin Size Color Circuit Function Terminal Type ID Option
1 0.75 BN / WH 4901 Direct Fuel Injector High Voltage Supply Cylinder 1 II -
2 0.75 BU / WH 4904 Direct Fuel Injector High Voltage Supply Cylinder 4 II -
3 0.75 BU / GY 4902 Direct Fuel Injector High Voltage Supply Cylinder 2 II -
4 0.75 GN / WH 4905 Direct Fuel Injector High Voltage Supply Cylinder 5 II -
5 0.5 YE 581 Throttle Actuator Open Control II -
6 0.5 WH / VT 5764 Exhaust Gas Recirculation Valve High Control II -
7 0.5 VT / BK 5746 Exhaust Gas Recirculation Valve Low Control II -
8 0.5 BK / BU 10597 Engine Control Sensors Low Reference 3 II -
9 0.5 BN / WH 582 Throttle Actuator Close Control II -
10 0.5 BN / VT 3656 EGR Cooler Bypass Valve Close Control II -
11 0.5 YE / GN 3655 EGR Cooler Bypass Valve Open Control II -
12 - - - Not Occupied - -
13 0.5 BU / WH 2530 Fuel Rail Pressure Solenoid Valve Control II -
14 - 16 - - - Not Occupied - -
17 0.5 YE 2928 Fuel Metering Solenoid Valve High Control II -
18 - 20 - - - Not Occupied - -
21 0.5 GN 10289 Exhaust Gas Temperature Sensor SENT 1 Signal I -
22 0.5 BU / WH 3630 Throttle Position Sensor SENT 1 Signal I -
23 - 25 - - - Not Occupied - -
26 0.5 GN / WH 432 Manifold Absolute Pressure Sensor Signal I -
27 0.5 YE / BN 331 Oil Pressure Sensor Signal I -
28 0.5 WH / BU 7329 Pre-Throttle Air Temperature Signal I -
29 0.5 BU 410 Engine Coolant Temperature Sensor Signal I -
30 0.5 BN 3681 Charge Air Cooler Outlet Temperature Sensor Signal I -
31 0.5 GN 3683 Charge Air Cooler Inlet Temperature Sensor Signal I -
32 - 38 - - - Not Occupied - -
39 0.5 BU / WH 2918 Fuel Rail Pressure Sensor Signal I -
40 0.5 BN / WH 5763 Exhaust Gas Recirculation Position Signal I -
41 0.5 GN / GY 3654 EGR Cooler Bypass Valve Position Sensor Signal I -
42 - 59 - - - Not Occupied - -
60 0.5 BN / GN 1174 Oil Level Switch Signal I -
61 - 63 - - - Not Occupied - -
64 0.5 BK / GN 2919 Fuel Rail Pressure Sensor Low Reference I -
65 - 76 - - - Not Occupied - -
77 0.5 BN / YE 2161 Fuel Rail Pressure Sensor 2 Signal I -
78 0.5 BK / YE 6275 Exhaust Gas Recirculation Temperature Sensor 2 Low Reference I -
79 - 82 - - - Not Occupied - -
83 0.5 BK / GY 5296 Exhaust Camshaft Position Sensor Low Reference 1 I -
84 0.5 GN 6271 Crankshaft Position Sensor Signal I -
85 0.5 BK / VT 6272 Crankshaft Position Sensor Low Reference I -
86 - 89 - - - Not Occupied - -
90 0.5 BN / RD 2917 Fuel Rail Pressure Sensor 5V Reference I -
91 0.5 YE / GN 3236 Exhaust Gas Recirculation Temperature Sensor 2 Signal I -
92 - 95 - - - Not Occupied - -
96 0.5 VT / BU 6270 Crankshaft Position Sensor Voltage I -
97 0.5 VT / BK 5273 Exhaust Camshaft Position Sensor 1 I -
98 0.5 GY / YE 5297 Exhaust Camshaft Position Sensor 1 Voltage Reference I -
99 0.75 WH / YE 4907 Direct Fuel Injector High Voltage Supply Cylinder 7 II -
100 0.75 VT / GY 4906 Direct Fuel Injector High Voltage Supply Cylinder 6 II -
101 0.75
0.75		 GY / WH
GY / BU		 4908
4908		 Direct Fuel Injector High Voltage Supply Cylinder 8
Direct Fuel Injector High Voltage Supply Cylinder 8		 II
II		 1ST_DESIGN
2ND_DESIGN
102 0.75 GN / GY 4903 Direct Fuel Injector High Voltage Supply Cylinder 3 II -
103 0.75 BN 4801 Direct Fuel Injector High Voltage Control Cylinder 1 II -
104 0.75 GY / BU 4804 Direct Fuel Injector High Voltage Control Cylinder 4 II -
105 0.75 BU 4802 Direct Fuel Injector High Voltage Control Cylinder 2 II -
106 0.75 WH / GN 4805 Direct Fuel Injector High Voltage Control Cylinder 5 II -
107 0.75 YE / GY 4807 Direct Fuel Injector High Voltage Control Cylinder 7 II -
108 0.75 VT / GN 4806 Direct Fuel Injector High Voltage Control Cylinder 6 II -
109 0.75 GY 4808 Direct Fuel Injector High Voltage Control Cylinder 8 II -
110 0.75 GN 4803 Direct Fuel Injector High Voltage Control Cylinder 3 II -
111 0.5 BU / RD 460 Engine Control Sensors 5 Volt Reference 1 II -
112 0.5 BK / YE 548 Engine Control Sensors Low Reference 1 II -
113 - 114 - - - Not Occupied - -
115 0.5 GY / RD 10667 Engine Control Sensors 5 Volt Reference II -
116 0.5 BK / GN 580 Engine Control Sensors Low Reference 2 II -
117 0.5 BK / YE 2834 Fuel Rail Pressure Solenoid Valve Low Control II -
118 0.5 BN / BK 2929 Fuel Metering Solenoid Valve Low Control II -
RENDER: 1.0x

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When to See a Mechanic

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.