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 (M3U)
2025 Chevrolet Equinox RS, FWDSECTION K71 Transmission Control Module (M3U)
WARNING: This page is about a different car, the 2024 GMC Terrain and 2024 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
Connector Part Information
|
Terminal Part Information
| Terminal Type ID | Terminated Lead | Diagnostic Test Probe | Terminal Removal Tool |
|---|---|---|---|
| I | 13587518 | J-35616-35 (VT) | J-38125-11A |
| II | 19351723 | J-35616-64B (L-BU) | J-38125-213 |
| Pin | Size | Color | Circuit | Function | Terminal Type ID | Option |
|---|---|---|---|---|---|---|
| 1 | 0.5 | WH / BU | 4507 | Transmission Clutch H Control | II | M3U |
| 2 | 0.5 | BU | 6401 | Clutch Solenoid Valve B Control | II | M3U |
| 3 | 0.5 | GY / GN | 6403 | Clutch Solenoid Valve D Control | II | M3U |
| 4 | 0.5 | VT | 4509 | Transmission Clutch F Control | II | M3U |
| 5 - 6 | - | - | - | Not Occupied | - | - |
| 7 | 0.5 | YE / GN | 4170 | Transmission Output Shaft Speed Sensor Circuit 9V Reference | II | M3U |
| 8 | 0.5 | YE / BU | 4171 | Transmission Input Shaft Speed Sensor Circuit 9V Reference | II | M3U |
| 9 - 12 | - | - | - | Not Occupied | - | - |
| 13 | 0.5 | GN / VT | 4510 | Transmission Intermediate Speed Signal | II | M3U |
| 14 | 0.5 | GY / BU | 6358 | Output Speed Signal | II | M3U |
| 15 | 0.5 | GN / YE | 6353 | Input Speed Signal | II | M3U |
| 16 | - | - | - | Not Occupied | - | - |
| 17 | 0.5 | WH | 4508 | Transmission Clutch G Control | II | M3U |
| 18 | 0.5 | BN | 6400 | Clutch Solenoid Valve A Control | II | M3U |
| 19 | 0.5 | GY | 6402 | Clutch Solenoid Valve C Control | II | M3U |
| 20 | 0.5 | YE / BN | 6404 | Clutch Solenoid Valve E Control | II | M3U |
| 21 | 0.5 | GY / BK | 5501 | TCC/Clutch Select Solenoid Valve Control | II | M3U |
| 22 | 0.5 | VT / BK | 7553 | Park Lock Solenoid Actuator Control | II | M3U |
| 23 | 0.5 | WH | 1971 | Transmission Oil Level Sensor Signal | II | M3U |
| 24 | 0.5 | WH / GY | 4578 | Surge Accumulator Solenoid Valve Low Side Control | II | M3U |
| 25 - 27 | - | - | - | Not Occupied | - | - |
| 28 | 0.5 | BK / BN | 586 | Transmission Fluid Temperature Sensor Low Reference | II | M3U |
| 29 - 30 | - | - | - | Not Occupied | - | - |
| 31 | 0.5 | GN / VT | 4621 | Engine Control Module LIN Bus 1 | II | M3U |
| 32 | - | - | - | Not Occupied | - | - |
| 33 | 0.5 | GN / GY | 6387 | Transmission High Side Driver 1 Control | II | M3U |
| 34 | - | - | - | Not Occupied | - | - |
| 35 | 0.5 | VT / GN | 439 | Run/Crank Ignition 1 Voltage | II | M3U |
| 36 | - | - | - | Not Occupied | - | - |
| 37 | 0.5 | BU | 2500 | High Speed GM LAN Serial Data [+] 1 | II | M3U |
| 38 | 0.5 | WH | 2501 | High Speed GM LAN Serial Data [-] 1 | II | M3U |
| 39 - 48 | - | - | - | Not Occupied | - | - |
| 49 | 0.5 | GY / BN | 6388 | Transmission High Side Driver 2 Control | II | M3U |
| 50 | - | - | - | Not Occupied | - | - |
| 51 | 0.5 | VT / YE | 5985 | Accessory Wake-Up Serial Data | II | M3U |
| 52 | - | - | - | Not Occupied | - | - |
| 53 | 0.5 | BU | 2500 | High Speed GM LAN Serial Data [+] 1 | II | M3U |
| 54 | 0.5 | WH | 2501 | High Speed GM LAN Serial Data [-] 1 | II | M3U |
| 55 - 58 | - | - | - | Not Occupied | - | - |
| 59 | 0.5 | VT / WH | 6319 | Electronic Transmission Range Select Out of Park Switch 2 Signal | II | M3U |
| 60 | 0.5 | WH / BK | 3705 | Electronic Transmission Range Select Switch Analog Signal 2 | II | M3U |
| 61 | 0.5 | WH / YE | 6317 | Electronic Transmission Range Select Out of Park Switch Signal | II | M3U |
| 62 | 0.5 | BN | 3706 | Electronic Transmission Range Select Switch Analog Signal 1 | II | M3U |
| 63 | 0.5 | BN / WH | 585 | Transmission Fluid Temperature Sensor Signal | II | M3U |
| 64 | - | - | - | Not Occupied | - | - |
| 65 | 1.5 | BK / WH | 151 | Signal Ground | I | M3U |
| 66 | 1.5 | RD / GN | 2173 | 12V Regulated Supply Voltage 2 | I | M3U |
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.