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 MANUALSCHEVROLET2019EXPRESS 2500 BASE, VAN CARGO EXTENDED, 6.0L ENG VIN GREPAIR AND DIAGNOSISELECTRICALWIRING DIAGRAMSCOMPONENT CONNECTOR END VIEWS (Q77H - X92)COMPONENT CONNECTOR END VIEWST12 AUTOMATIC TRANSMISSION ASSEMBLY
2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN G
T12 Automatic Transmission Assembly
2019 Chevrolet Express 2500 Base, Van Cargo Extended, 6.0L Eng VIN GSECTION T12 Automatic Transmission Assembly
Connector Part Information
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Terminal Part Information
| Terminal Type ID | Terminated Lead | Diagnostic Test Probe | Terminal Removal Tool | Service Terminal | Tray Name | Core Crimp | Insulation Crimp |
|---|---|---|---|---|---|---|---|
| I | 13575434 | J-35616-66 (YE) | J-38125-28 | 2 21 24 47220 0 | Yazaki 12 | E | 1 |
| II | 13578934 | J-35616-66 (YE) | J-38125-28 | 2 21 24 47220 0 | Yazaki 12 | E | 1 |
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| 1 - 2 | - | - | - | Not Occupied | - | - |
| 3 | 0.5 | OG/BK | 1786 | Transmission Park/Neutral Signal 1 | II | L96/LC8 |
| 4 | 0.35 | RD/WH | 1840 | Battery Positive Voltage | I | - |
| 5 | 0.8 | BK/WH | 1551 | Signal Ground | II | - |
| 6 | 0.5 | L-BU/WH | 6311 | Cruise/ETC/TCC Brake Signal | II | L96/LC8 |
| 7 | - | - | - | Not Occupied | - | - |
| 8 | 0.5 | TN | 2501 | High Speed GMLAN Serial Data (-) 1 | II | - |
| 9 | 0.5 | D-BU | 5985 | Accessory Wakeup Serial Data | II | L96/LC8 |
| 10 | 0.5 | TN/BK | 2500 | High Speed GMLAN Serial Data (+) 1 | II | - |
| 11 | 0.5 | TN | 2501 | High Speed GMLAN Serial Data (-) 1 | II | - |
| 12 | 0.5 | PK | 2139 | Run/Crank Ignition 1 Voltage | II | L96/LC8 |
| 13 | 0.5 | TN | 2501 | High Speed GMLAN Serial Data (-) 1 | II | - |
| 14 | 0.5 | TN/BK | 2500 | High Speed GMLAN Serial Data (+) 1 | II | - |
| 15 | 0.5 | TN/BK | 2500 | High Speed GMLAN Serial Data (+) 1 | II | - |
| 16 | 0.5 | OG/BK | 6399 | Replicated TOS Signal | II | - |
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.