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.
K71 Transmission Control Module X1 (LTG+MRC)
2018 Buick Regal BaseSECTION K71 Transmission Control Module X1 (LTG+MRC)
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 | 13578896 | J-35616-64B (LT BU) | J-38125-553 | 7116-4721-02 | Yazaki 14 | J | J |
| II | 13582185 | J-35616-14 (GN) | J-38125-557 | Not Available | Not Available | Not Available | Not Available |
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| 1 | 1.5 | RD/GN | 2173 | 12V Regulated Supply Voltage 2 | II | LTG+MRC |
| 2 - 4 | - | - | - | Not Occupied | - | - |
| 5 | 0.5 | WH/GY | 1786 | Transmission Park/Neutral Signal 1 | I | LTG+MRC |
| 6 | 0.5 | WH | 2501 | High Speed GMLAN Serial Data (-) 1 | I | LTG+MRC |
| 7 | 0.5 | BU | 2500 | High Speed GMLAN Serial Data (+) 1 | I | LTG+MRC |
| 8 | 0.5 | BU | 2500 | High Speed GMLAN Serial Data (+) 1 | I | LTG+MRC |
| 9 | 1.5 | BK/WH | 151 | Signal Ground | II | LTG+MRC |
| 10 | - | - | - | Not Occupied | - | - |
| 11 | 0.5 | VT/BK | 2139 | Run/Crank Ignition 1 Voltage | I | LTG+MRC |
| 12 | 0.5 | VT/YE | 5985 | Accessory Wakeup Serial Data | I | LTG+MRC |
| 13 | - | - | - | Not Occupied | - | - |
| 14 | 0.5 | WH | 2501 | High Speed GMLAN Serial Data (-) 1 | I | LTG+MRC |
| 15 - 16 | - | - | - | 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.