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.
B15 Transmission Internal Mode Switch (M5U)
2018 Chevrolet Tahoe LT, 4WD, GasSECTION B15 Transmission Internal Mode Switch (M5U)
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 | Not Required | Not Available | No Tool Required | Not Required | Not Required | Not Required | Not Required |
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| 1 | 0.5 | WH/GY | 1786 | Transmission Park/Neutral Signal 1 | I | - |
| 2 | 0.5 | BK/GY | 3927 | IMS Mode Switch Low Reference | I | - |
| 3 | - | - | - | Not Occupied | - | - |
| 4 | 0.5 | YE/BU | 4171 | Transmission Position Sensor A 9V Reference | I | - |
| 5 | 0.5 | VT/WH | 5981 | PRNDL A Signal | I | - |
| 6 | 0.5 | WH/BK | 5983 | PRNDL C Signal | I | - |
| 7 | 0.5 | GY/YE | 4169 | PRNDL S Signal | I | - |
| 8 | 0.5 | GY/BN | 5982 | PRNDL B Signal | I | - |
| 9 | 0.5 | GY/WH | 4168 | PRNDL P Signal | I | - |
| 10 | 0.5 | YE/GN | 4170 | Transmission Position Sensor B 9V Reference | 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.