Yes the TSB states the factory brake controller CAN NOT be installed after the fact. Do you need to see it?

 

well shit.

If you have it, it would be nice to see.

 

Figured you would so I went and got it,
Service Information Home Publications Number Search New Bulletins Bulletin Search Feedback Help
2014 Chevrolet Silverado 1500 - 4WD | Cheyenne, Sierra, Silverado 1500 Service Manual 5565479 | View All Bulletins | Document ID: 3790549
#PIT5241B: Adding Integrated Trailer Brake Controller RPO JL1 - (Mar 27, 2014)
Subject: Adding Integrated Trailer Brake Controller RPO JL1

Models: 2014 Chevrolet Silverado 1500
2015 Chevrolet Silverado, Suburban, Tahoe
2014 GMC Sierra 1500
2015 GMC Sierra, Yukon Models
This PI was superseded to update Note section. Please discard PIT5241A.

Some customers may request the factory Integrated Trailer Brake Controller (RPO JL1) be installed on their Full-Size Pickup or SUV when the vehicle was not ordered with the option.

This is to advise you that - if the vehicle does not have the option (RPO JL1), it cannot be added to the vehicle.

Note: Reference the latest version of PI1105 - which advises how to install an aftermarket trailer brake controller.

ADDITIONAL SI KEYWORDS:
connector electric hydraulic ITBC TBCM tow towing wire wiring

 

thank you!

It literally makes no sense to me... they equip the truck with the trailer package, but not the controller. Almost seems like a potential liability.

 

It was a step up when they started pre-wiring the trucks for the brake controller and actually included a jumper, so you could install the control of your choice.
Then they started with the built-in ones, but too much has to change to make it a retrofit. You can still add the aftermarket control though. So, it's all on you: No liability on the manufacturer's side.

Of course, Ford and Ram allow you to retrofit theirs, and I think it is even cheap to do so. GM hasn't always been known to make the best decisions, but I'm blaming government ownership for this one.

 

I just don't understand why everything has to be someone's fault !!