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Brake Controller

Troy Thielen

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Troy Thielen New Member

Troy Thielen

Posted
Posted

I have a 2015 GMC Sierra SLT with just about everything on it except the built in factory trailer brake controller. So I bought an OEM replacement factory brake controller to install but now I heard that the vehicle's computer won't recognize the brake controller unless it's installed from the factory and it can't be re-programmed for that. Has anyone heard this about installing a factory brake controller after-the-fact? Any help or information you have would be much appreciated. Thanks!!!

TJay74 Senior Enthusiast

TJay74

Posted
Posted

Correct, cant be done. Return the OEM controller and buy an aftermarket one.

TJay74 Senior Enthusiast

TJay74

Posted
Posted

It can be done but requires programing and a new chassis wire harness

 

 

Then incorrect, while you can get the chassis harness and to some degree the OP may already have it as certain trim level trucks use the same IP harness you wont be able to get past the programming issue. GM issued out a memo detailing this issue and said there was no way to program the BCM for the factory TBC if the vehicle didn't come with it from the factory.

johnny05 Enthusiast

johnny05

Posted
Posted

Chris white can do the programming the work he does is amazing he can take a slt truck and put a denali insturment panel in you can get a hold of him from his website but only contact him on Saturdays and Sundays from 10am to 4pm

O_J_Simpson Senior Enthusiast

O_J_Simpson

Posted
Posted

Then incorrect, while you can get the chassis harness and to some degree the OP may already have it as certain trim level trucks use the same IP harness you wont be able to get past the programming issue. GM issued out a memo detailing this issue and said there was no way to program the BCM for the factory TBC if the vehicle didn't come with it from the factory.

Several people can get past the programming issue with a custom program, including some here that offer the service. The only barrier is parts and a lot of money that makes this cost prohibited for most people.

TJay74 Senior Enthusiast

TJay74

Posted
Posted

Several people can get past the programming issue with a custom program, including some here that offer the service. The only barrier is parts and a lot of money that makes this cost prohibited for most people.

 

Not several people, one person and that is Chris White. He worked for GM in the past from what I remember from other boards he was on back in the day which is why he is so knowledgeable on GM stuff and how it works. He has been doing things to GM programming for years.

 

The only bad about having the BCM custom flashed is if the dealer ever flashes any update to your BCM you would lose the changes Chris makes to your BCM.

GTPprix Senior Enthusiast

GTPprix

Posted
Posted

The only bad about having the BCM custom flashed is if the dealer ever flashes any update to your BCM you would lose the changes Chris makes to your BCM.

 

This is true so you have to be careful however the trailer brake actually involves multiple modules for example the display is on the IPC so we have to do work there as well. This aspect makes it even more difficult as well as expensive, we'd have to develop everything for multiple modules; not cheap (but doable).

johnny05 Enthusiast

johnny05

Posted
Posted

Several people can get past the programming issue with a custom program, including some here that offer the service. The only barrier is parts and a lot of money that makes this cost prohibited for most people.

For me cost doesn't matter who else do you know that does programming

Imcrazy Senior Enthusiast

Imcrazy

Posted
Posted

For me cost doesn't matter who else do you know that does programming

If cost doesn't matter trade the truck in for one with the equipment you want, it's probably not going to be much more costly than having someone hack your truck up over a brake controller.

 

Semi off topic, why doesn't every GM truck with a tow package just come with the brake controller? Seems silly to me.

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