T12 Automatic Transmission Assembly X1 (MGM/MGU)
WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
 Courtesy of GENERAL MOTORS COMPANY
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Connector Part Information
- Harness Type:Engine Wiring Harness
- OEM Connector: 33178413
- Service Connector: 13596549
- Description: 26-Way F 1.2 MCON-CB Series, Sealed (BK)
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Terminal Part Information
| Terminal Type ID |
Terminated Lead |
Diagnostic Test Probe |
Terminal Removal Tool |
| I |
19331733 |
J-35616-12 (BU) |
J-38125-215A |
| II |
84963773 |
J-35616-12 (BU) |
J-38125-215A |
| Pin |
Size |
Color |
Circuit |
Function |
Terminal Type ID |
Option |
| 1 |
0.5 |
GN/YE |
6353 |
Input Speed Signal |
I |
- |
| 2 |
0.5 |
GN/VT |
4510 |
Transmission Intermediate Speed Signal |
I |
- |
| 3 |
0.5 |
BN/WH |
6254 |
Transmission Input Speed Sensor Signal |
I |
- |
| 4 |
0.5 |
GY/BU |
6358 |
Output Speed Signal |
I |
- |
| 5 |
0.5 |
GN/YE |
5724 |
Ignition Mode Switch Mode Control |
I |
- |
| 6 |
0.5 |
WH/BU |
5726 |
Ignition Mode Switch Mode Control Backup |
I |
- |
| 7 |
0.5 |
YE/GN |
4170 |
Transmission Output Shaft Speed Sensor Circuit 9V Reference |
I |
- |
| 8 |
0.5 |
YE/BU |
4171 |
Transmission Input Shaft Speed Sensor Circuit 9V Reference |
I |
- |
| 9 |
0.5 |
GY/BN |
6388 |
Transmission High Side Driver 2 Control |
I |
- |
| 10 |
0.75 |
RD/VT |
7940 |
Battery Positive Voltage |
I |
- |
| 11 |
0.5 |
GN/GY |
6387 |
Transmission High Side Driver 1 Control |
I |
- |
| 12 |
0.5 |
YE/BU |
3992 |
Internal Mode Switch Voltage Supply A |
I |
- |
| 13 |
0.5 |
BN/WH |
585 |
Transmission Fluid Temperature Sensor Signal |
I |
- |
| 14 |
0.5 |
YE/BN |
6404 |
Clutch Solenoid Valve E Control |
I |
- |
| 15 |
0.5 |
GY/GN |
6403 |
Clutch Solenoid Valve D Control |
I |
- |
| 16 |
0.5 |
GY |
6402 |
Clutch Solenoid Valve C Control |
I |
- |
| 17 |
1.5 |
BK |
4450 |
Ground |
II |
- |
| 18 |
0.5 |
GN/WH |
2968 |
Transmission Auxiliary Fluid Pump Control |
I |
- |
| 19 |
0.5 |
GN/BK |
7819 |
Default Disable Solenoid Control |
I |
- |
| 20 |
0.5 |
BK/GY |
3927 |
Transmission Internal Mode Switch Feedback Signal |
I |
- |
| 21 |
0.5 |
VT |
4509 |
Transmission Clutch F Control |
I |
- |
| 22 |
0.5 |
WH/BU |
4507 |
Transmission Clutch H Control |
I |
- |
| 23 |
0.5 |
WH |
4508 |
Transmission Clutch G Control |
I |
- |
| 24 |
0.5 |
GN/WH |
1530 |
Transmission Line Pressure Control Solenoid Valve Control |
I |
- |
| 25 |
0.5 |
VT/WH |
422 |
Torque Converter Clutch Solenoid Valve Control |
I |
- |
| 26 |
0.5 |
BK/BN |
586 |
Transmission Fluid Temperature Sensor Low Reference |
I |
- |