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 MANUALSCHEVROLET2020EXPRESS 2500 LS, 2.8L ENG VIN 1REPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSWIRING DIAGRAMSCOMPONENT CONNECTOR END VIEWS (K71-Q77G)COMPONENT CONNECTOR END VIEWSK73 TELEMATICS COMMUNICATION INTERFACE CONTROL MODULE X2
2020 Chevrolet Express 2500 LS, 2.8L Eng VIN 1
K73 Telematics Communication Interface Control Module X2
2020 Chevrolet Express 2500 LS, 2.8L Eng VIN 1SECTION K73 Telematics Communication Interface Control Module X2
Connector Part Information
|
Terminal Part Information
| Terminal Type ID | Terminated Lead | Diagnostic Test Probe | Terminal Removal Tool | Service Terminal | Tray Name | Core Crimp | Insulation Crimp |
|---|---|---|---|---|---|---|---|
| I | 13575546 | J-35616-16 (LT GN) | J-38125-559 | Not Required | Not Required | Not Required | Not Required |
| II | 13575548 | J-35616-16 (LT GN) | J-38125-559 | Not Required | Not Required | Not Required | Not Required |
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| 1 | 0.8 0.35 |
D-BU/ D-BU/ |
658 658 |
Cellular Telephone Voice Signal Cellular Telephone Voice Signal |
II I |
UE1-UL5-UI8 UI8+UE1 |
| 2 | 0.8 0.35 |
L-BU/BK L-BU/BK |
659 659 |
Cellular Telephone Voice Low Reference Cellular Telephone Voice Low Reference |
II I |
UE1-UL5-UI8 UI8+UE1 |
| 3 | 0.5 | BU | 2500 | High Speed GMLAN Serial Data [+] 1 | II | - |
| 4 | 0.5 | WH | 2501 | High Speed GMLAN Serial Data [-] 1 | II | - |
| 5 | 0.35 | BARE | 1792 | Low Reference 7 | I | - |
| 6 | 0.35 | PK | 5149 | Voice Recognition Audio Signal | I | - |
| 7 | - | - | - | Not Occupied | - | - |
| 8 | 0.8 0.35 |
BARE BARE |
1792 1782 |
Low Reference 7 Low Reference 6 |
II I |
UE1-UL5-UI8 UI8+UE1 |
| 9 | 0.8 | GY | 655 | Cellular Telephone Microphone Signal | II | - |
| 10 | 0.8 | D-GN/ | 654 | Cellular Telephone Microphone Low Reference | II | - |
| 11 | - | - | - | Not Occupied | - | - |
| 12 | 0.35 | PK/BK | 5152 | Voice Recognition Audio [-] Control | 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.