PIT5282 Service Bulletin/Repair Instructions

File in Section:
Service Bulletin
Bulletin No.:

Date:
PIT5282

April, 2014
PRELIMINARY INFORMATION

Subject:
Installation Of An Aftermarket Trailer Brake Controller In Lieu Of Factory Trailer Brake

Controller
Models:
2014 Chevrolet Silverado 1500

2015 Chevrolet Silverado

2014 GMC Sierra 1500

2015 GMC Sierra

With Integrated Trailer Brake Control (ITBC) (RPO JL1)
The Integrated Trailer Brake Control (ITBC) system will work with electric trailer brakes and most electric over

hydraulic trailer brakes.

In some instances, an owner may request the factory ITBC be bypassed and their aftermarket trailer brake controller

be installed instead.

To support such requests, locate connector X185 near the underhood fuse block, terminal 32. Circuit 47 ends at the

body harness side of X185 terminal 32, which comes from the X61A junction block. Obtain enough Dark Blue 12

gauge wire to run from X185 to the 7-way trailer connector at the bumper. Attach terminated lead part number

13327155 to one end of the Dark Blue and insert into the chassis harness side of the X185 connector terminal 32.

Run the Dark Blue wire in its own conduit along the frame to the 7-way trailer connector at the bumper. Remove

circuit 47 from the 7-way trailer connector terminal “C” and tape the bare terminal and attach to the harness. Attach

terminal part number 12110853, located in Delphi Tray 4, to the other end of the Dark Blue wire, with the correct

weather pack seal, and insert it into the 7-way trailer connector terminal “C.”

Obtain a trailer brake controller harness, GM Part # 23184088, as shown below.
3755495
Connect the harness to the MID-BEC (X61A). The MID-BEC is located under the I/P to the left of the steering

column. The harness connection point (1) is illustrated below.
3610482
Complete instructions for installation of the harness are included in the harness packaging.

Important: This procedure will not result in any trailer brake related display messages to be set. However, ITBC

diagnostics will continue to function. If an ITBC fault is detected, a “Service Trailer Brake System” message will be

displayed on the driver information center (DIC) and an appropriate DTC will be stored in the ITBC module. The

operator will still be able to adjust gain and access the “Trailer Gain / Output” display page in the DIC. However, the

factory installed ITBC system will not sense a trailer connection and will not provide output to the trailer.
Parts Information

Part Number
Description
Qty
23184088
Trailer Brake Controller Harness
1
Warranty Information

If the customer wishes to have an aftermarket brake controller installed in their vehicle, it would be considered as a

Customer Pay option.

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