NHTSA ID Number: 11007761
Manufacturer Communication Number: PIT5282G
TSB/Document Date: 2024-09-13
Summary
This Preliminary Information communication provides information to the technician that a customer may request the factory Integrated Trailer Brake Control be bypassed and their aftermarket trailer brake controller be installed instead. Technician will need to gain access to the body harness. Install trailer brake controller harness General Motors
part number 23184088 into Middle Bus Electrical Center (X61A).?
Bulletin No.: PIT5282G
Published date: 08/20/2024
Preliminary Information
PIT5282G Procedure for Installation of an Aftermarket Trailer Brake
Controller or In Lieu of Factory Trailer Brake Controller
Models
Brand:
Model:
Model Years:
Cadillac Escalade
2015
Chevrolet Silverado 1500
2014
Chevrolet Silverado
2015
Chevrolet Silverado LD
2019
Chevrolet Silverado 2500/3500 2019
Chevrolet Suburban
2015
Chevrolet Tahoe
2015
GMC
Sierra 1500
2014
GMC
Sierra
2015
GMC
Sierra Limited
2019
GMC
Sierra 2500/3500
2019
GMC
Yukon Models
2015
- 2020
- 2018
- 2020
- 2020
- 2018
- 2020
VIN:
Engine: Transmissions:
from to
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Supersession Statement
This PI was superseded to update the correction. Please discard PIT5282F.
Condition / Concern
Some customers may request to have an aftermarket trailer brake controller added to their
vehicle, OR an aftermarket trailer brake controller added in lieu of the factory integrated
trailer brake controller (ITBC) (RPO JL1).
Recommendations / Instructions
1. Obtain a trailer brake controller harness, GM Part # 23184088, as shown below.
2. 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.
3. The trailer brake controller harness consist of 4 blunt cut wires and a label that calls
out the wire colors and each wire’s function, also shown below. Use these 4 blunt cut
wires to connect to the aftermarket trailer brake control.
Four Blunt Cut Wires
Dark Blue
Circuit 47
Brake Output To Trailer
Red/Green
Circuit 242
Battery Power (30 AMP)
White/Blue
Circuit 3691
Brake Signal
Black
Circuit 1050
Ground
4. Perform this step ONLY if equipped with RPO JL1 where the customer is requesting the
factory trailer brake system be bypassed to add an aftermarket trailer brake controller.
Locate connector X185 Or X138 (varies with vehicle build; refer to SI), which is near the
underhood fuse block, terminal 32. Circuit 47 ends at the body harness side of X185 or
X138 terminal 32, which comes from the X61A junction block. Obtain enough Dark Blue 12
gauge wire to run from X185 or X138 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 or X138 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.”
Important: The procedure in Step 4 will not result in any trailer brake related service
messages or DTCs to be set. The operator will still be able to adjust gain and access the
“Trailer Gain / Output” display page in the DIC. However, the factory installed trailer brake
system will not sense a trailer connection and will not provide output to the trailer. Also,
the factory trailer brake control module diagnostics will continue to function and if a 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.
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.
GM Global Brands
© 2024 General Motors. All Rights Reserved.
- Mixes well with conventional fluids
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- Ideal for hydraulic and disc brakes
- Provides an extra margin of safety in extreme braking...
- Mix of polyglycol ethers ensures hot brake-system operation...
- Excellent for ABS, disc and drum brake systems
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TSB/Document ID: PIT5282G
Replacement Service Bulletin Number:
MFR Communication Date: 2024-09-13
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES
MFR Component System:
MFR Component Subsystem:
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