K68 Trailer Lighting Control Module (U1D)
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:Chassis Wiring Harness
- OEM Connector: 33235465
- Service Connector: 84769286
- Description: 38-Way F 1.5, 2.8, 4.8 MCP Series, Sealed (BK with BN Inner Connector)
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Terminal Part Information
| Terminal Type ID |
Terminated Lead |
Diagnostic Test Probe |
Terminal Removal Tool |
| I |
19368624 |
J-35616-35 (VT) |
J-38125-212 |
| II |
19369235 |
J-35616-14 (GN) |
EL-38125-560A |
| III |
85158596 |
J-35616-40 (BU) |
EL-38125-560A |
| Pin |
Size |
Color |
Circuit |
Function |
Terminal Type ID |
Option |
| 1 |
2.5 |
RD/YE |
5840 |
Battery Positive Voltage |
III |
- |
| 2 |
0.75 |
YE/BU |
1618 |
Left Rear Trailer Stop/Turn Lamp Control |
II |
- |
| 3 |
0.75 |
GN/VT |
1619 |
Right Rear Trailer Stop/Turn Lamp Control |
II |
- |
| 4 - 6 |
- |
- |
- |
Not Occupied |
- |
- |
| 7 |
0.75 |
WH/GN |
5189 |
Trailer Backup Lamp Control |
II |
- |
| 8 - 9 |
- |
- |
- |
Not Occupied |
- |
- |
| 10 |
0.5 |
VT/GN |
439 |
Run/Crank Ignition 1 Voltage |
II |
- |
| 11 |
0.5 |
VT/WH |
5065 |
Stop Lamp Relay Coil Control |
II |
- |
| 12 |
- |
- |
- |
Not Occupied |
- |
- |
| 13 |
2.5 |
BK |
1750 |
Ground |
III |
- |
| 14 - 24 |
- |
- |
- |
Not Occupied |
- |
- |
| 25 |
0.75 |
GY/BN |
2109 |
Trailer Park Lamp Control |
I |
- |
| 26 |
- |
- |
- |
Not Occupied |
- |
- |
| 27 |
0.5 |
GN |
5060 |
Low Speed GMLAN Serial Data |
II |
- |
| 28 - 37 |
- |
- |
- |
Not Occupied |
- |
- |
| 38 |
2 |
RD/VT |
5640 |
Battery Positive Voltage |
I |
- |