Pipelnr

I have done some research and found this on a GM mechanic site Document ID: 5475486 2022-04-05, 5:12 PM 2019 Chevrolet Silverado 2500/3500 - 4WD | Sierra Limited, Sierra 2500/3500, Silverado LD, Silverado 2500/3500 Service Manual 12106552 | Brakes | Preliminary Information | Document ID: 5475486 #PIT5282F: Procedure for Installation of an Aftermarket Trailer Brake Controller or In Lieu of Factory Trailer Brake Controller - (Dec 19, 2019) Subject: Procedure for Installation of an Aftermarket Trailer Brake Controller or In Lieu of Factory Trailer Brake Controller Brand: Model: Model Year: VIN: Engine: from to from to Cadillac Chevrolet Chevrolet Chevrolet GMC Escalade Silverado Suburban Tahoe Sierra 2015-2020 2015-2018 2015-2020 2015-2020 2015-2018 Transmission: All All All All All All All All All All All All All All All All All All All All Chevrolet Silverado 1500 2014 All All All All Chevrolet Silverado LD 2019 All All All All Chevrolet Silverado 2019 2500/3500 All All All All GMC Sierra 1500 2014 All All All All GMC Sierra Limited 2019 All All All All GMC Sierra 2019 2500/3500 All All All All https://gsitlc.ext.gm.com/gsi/showDoc.do?pubName=Sierra Limite...key=0&vin=&from=bcpi&region=1&laborOpCode=&windowID=si822212276 Page 1 of 4 Document ID: 5475486 2022-04-05, 5:12 PM GMC Yukon Models 2015-2020 All All All All Supersession Statement © 2022 General Motors. All rights reserved. This PI was superseded to add the 2020 models. Please discard PIT5282E. 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). Recommendation/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. https://gsitlc.ext.gm.com/gsi/showDoc.do?pubName=Sierra%20Limite...key=0&vin=&from=bcpi&region=1&laborOpCode=&windowID=si822212276 Page 2 of 4 Document ID: 5475486 2022-04-05, 5:12 PM 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 Red/Green White/Blue Black Circuit 47 Circuit 242 Circuit 3691 Circuit 1050 Brake Output To Trailer Battery Power (30 AMP) Brake Signal 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.” Parts Information https://gsitlc.ext.gm.com/gsi/showDoc.do?pubName=Sierra%20Limite...key=0&vin=&from=bcpi&region=1&laborOpCode=&windowID=si822212276 Page 3 of 4 Document ID: 5475486 2022-04-05, 5:12 PM 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 bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION Part Number Description Qty https://gsitlc.ext.gm.com/gsi/showDoc.do?pubName=Sierra%20Limite...key=0&vin=&from=bcpi&region=1&laborOpCode=&windowID=si822212276 Page 4 of 4

I have replaced the pig tail running from the truck to the rv. This greatly helped, I have manually adjusted the rv brakes, but the controller still sucks. Does anyone know how to delete the intergrated brake control and install a aftermarket controller?

Thank you I will check

There are no warning messages. I will test the amps at the brakes. This is the first time anyone ever told me how many amps I should have, thank you. The magnets all seem good. I am thinking now I may have corrosion on wiring connection at the pig tail and will test as soon as possible. Thanks

I have jacked up the rv and adjusted all brakes so it is either the controller or a bad connection. I am going to replace the pig tail and try that

None

Ok update I have went through the rv brakes and all are good. Now I am left with the truck brake system. I checked the voltage at the plug and can get 12 volts if gain is on max, but voltage drops down to 8 volts if below max setting. I would think the voltage should be 12 volts all the time and amps would change. I hooked up and held brakes on trailer at max and just slowly pulled trailer, brakes applied on trailer but not holding, and pulled rite through them at just over an idle. What do I need to do?

Ok update I have went through the rv brakes and all are good. Now I am left with the truck brake system. I checked the voltage at the plug and can get 12 volts if gain is on max, but voltage drops down to 8 volts if below max setting. I would think the voltage should be 12 volts all the time and amps would change. I hooked up and held brakes on trailer at max and just slowly pulled trailer, brakes applied on trailer but not holding, and pulled rite through them at just over an idle. What do I need to do?

This is intergrated controller , my previous truck had no issues so I’m not sure which way to go

The pads look good and they all seem to be working on trailer. They are self adjusting brakes on dexter axles. Does anyone know how much current there should Bo on maxed out controller at brakes?

I don’t have that option

My trailer brake control set on 10 will not stop trailer, it is working but not strong enough gain. Do I need to replace the controller?