Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSGMC2024SIERRA 2500 HD DENALI ULTIMATEREPAIR AND DIAGNOSISELECTRICALWIRING DIAGRAMSCOMPONENT CONNECTOR END VIEWS (K56 - K111)COMPONENT CONNECTOR END VIEWSK71 TRANSMISSION CONTROL MODULE (L8T)
2024 GMC Sierra 2500 HD Denali Ultimate
K71 Transmission Control Module (L8T)
2024 GMC Sierra 2500 HD Denali UltimateSECTION K71 Transmission Control Module (L8T)
Connector Part Information
|
Terminal Part Information
| Terminal Type ID | Terminated Lead | Diagnostic Test Probe | Terminal Removal Tool |
|---|---|---|---|
| I | 13587518 | J-35616-35 (VT) | J-38125-11A |
| II | 19351723 | J-35616-64B (L-BU) | J-38125-213 |
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| 1 | 0.5 | VT / WH | 422 | Torque Converter Clutch Solenoid Valve Control | II | - |
| 2 | 0.5 | GY / GN | 6403 | Clutch Solenoid Valve D Control | II | - |
| 3 | 0.5 | WH / BU | 4507 | Transmission Clutch H Control | II | - |
| 4 | 0.5 | WH | 4508 | Transmission Clutch G Control | II | - |
| 5 - 6 | - | - | - | Not Occupied | - | - |
| 7 | 0.5 | YE / GN | 4170 | Transmission Output Shaft Speed Sensor Circuit 9V Reference | II | - |
| 8 | 0.5 | YE / BU | 4171 | Transmission Input Shaft Speed Sensor Circuit 9V Reference | II | - |
| 9 - 11 | - | - | - | Not Occupied | - | - |
| 12 | 0.5 | GN / YE | 6353 | Input Speed Signal | II | - |
| 13 | 0.5 | GN / VT | 4510 | Transmission Intermediate Speed Signal | II | - |
| 14 | 0.5 | GY / BU | 6358 | Output Speed Signal | II | - |
| 15 | 0.5 | BN / WH | 6254 | Transmission Input Speed Sensor Signal | II | - |
| 16 | - | - | - | Not Occupied | - | - |
| 17 | 0.5 | GN / WH | 1530 | Transmission Line Pressure Control Solenoid Valve Control | II | - |
| 18 | 0.5 | YE / BN | 6404 | Clutch Solenoid Valve E Control | II | - |
| 19 | 0.5 | GY | 6402 | Clutch Solenoid Valve C Control | II | - |
| 20 | 0.5 | VT | 4509 | Transmission Clutch F Control | II | - |
| 21 | - | - | - | Not Occupied | - | - |
| 22 | 0.5 | GN / BK | 7819 | Default Disable Solenoid Control | II | - |
| 23 - 27 | - | - | - | Not Occupied | - | - |
| 28 | 0.5 | BK / BN | 586 | Transmission Fluid Temperature Sensor Low Reference | II | - |
| 29 - 32 | - | - | - | Not Occupied | - | - |
| 33 | 0.5 | GN / GY | 6387 | Transmission High Side Driver 1 Control | II | - |
| 34 | - | - | - | Not Occupied | - | - |
| 35 | 0.5 | VT / GN | 439 | Run/Crank Ignition 1 Voltage | II | - |
| 36 | - | - | - | Not Occupied | - | - |
| 37 | 0.5 | BU / YE | 4979 | AUTOSAR CAN Bus [+] 2 Serial Data | II | - |
| 38 | 0.5 | WH | 4978 | AUTOSAR CAN Bus [-] 2 Serial Data | II | - |
| 39 - 48 | - | - | - | Not Occupied | - | - |
| 49 | 0.5 | GY / BN | 6388 | Transmission High Side Driver 2 Control | II | - |
| 50 - 52 | - | - | - | Not Occupied | - | - |
| 53 | 0.5 | BU / YE | 4979 | AUTOSAR CAN Bus [+] 2 Serial Data | II | - |
| 54 | 0.5 | WH | 4978 | AUTOSAR CAN Bus [-] 2 Serial Data | II | - |
| 55 - 62 | - | - | - | Not Occupied | - | - |
| 63 | 0.5 | BN / WH | 585 | Transmission Fluid Temperature Sensor Signal | II | - |
| 64 | 0.5 | BU / WH | 3338 | Transmission Internal Mode Switch Mode Control X | II | - |
| 65 | 1.5 | BK / WH | 251 | Signal Ground | I | - |
| 66 | 1.5 | RD / GN | 1840 | Battery Positive Voltage | I | - |
RENDER: 1.0x
NO RELATED
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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.