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 VIEWSK56 SERIAL DATA GATEWAY MODULE X3
2024 GMC Sierra 2500 HD Denali Ultimate
K56 Serial Data Gateway Module X3
2024 GMC Sierra 2500 HD Denali UltimateSECTION K56 Serial Data Gateway Module X3
Connector Part Information
|
Terminal Part Information
| Terminal Type ID | Terminated Lead | Diagnostic Test Probe | Terminal Removal Tool |
|---|---|---|---|
| I | Service by Cable | No Tool Required | No Tool Required |
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| 1 - 6 | - | - | - | Not Occupied | - | - |
| 7 | 0.35 0.35 |
YE BN |
4758 7211 |
Ethernet Bus 2 [+] Ethernet Bus 4 [+] |
I I |
IOK IOR+UE1 |
| 8 | 0.35 0.35 |
BU GY |
4757 7210 |
Ethernet Bus 2 [-] Ethernet Bus 4 [-] |
I I |
IOK IOR+UE1 |
| 9 | 0.35 | YE | 4758 | Ethernet Bus 2 [+] | I | - |
| 10 | 0.35 | BU | 4757 | Ethernet Bus 2 [-] | I | - |
| 11 - 26 | - | - | - | Not Occupied | - | - |
| 27 | 0.35 | GN | 7217 | Ethernet Bus 7 [+] | I | - |
| 28 | 0.35 | WH | 7216 | Ethernet Bus 7 [-] | I | - |
| 29 - 30 | - | - | - | Not Occupied | - | - |
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.