Problems with integrated brake control

[Popo1984]

My 2017 Silverado has the trailer equipment package and factory integrated brake control. I just bought a travel trailer and assumed once I plugged the trailer in the brake gain info would appear on my dic. Nothing shows up. I can’t even find a brake control option paging through the dic screen. I’m getting a good connection with the trailer since all the lights work. There is a new battery on the trailer as well. 

 

What can i check? Or am I missing something here? There is an extra harness in the glove box but I think that one is for installing an aftermarket brake controller. Ready the owners manual I should at least be able to scroll though the dic and find the brake gain. 

[Dr Awesome]

It should be controlled on the left side if it's like mine.  I'm not an expert, but I did mess with it and just hit + or - and the gain popped up.  If this isn't there, then you might not have the brake controller option.

[swathdiver]

On vehicles with the Integrated
Trailer Brake Control (ITBC) system,
turn the trip odometer reset stem
until TRAILER GAIN and TRAILER
OUTPUT displays.

 

If that does not cause it to show up, take it in to the dealer to see if the factory neglected to activate that module.

[Popo1984]

I have a service appointment Monday morning. I have the intergraded switch and rpo code in glove box. Even when I press the + or- the gain screen will not show. 

[Z45]

On my truck, a 2017 Sierra Denali you have to be in tow haul mode. My 2015 was the same, engage tow haul mode (and trailer connected) and that the info shows up on the dash display. Now I can't tell you if the Silverado is same as the GMC as the Denali has a digital dash. 

[Popo1984]

I tried that as well. Sucks cause i just bought a travel trailer yesterday to take out of town now i have to take it to my buddies for a week till the dealer figures it out. 

[Z45]

Does it work though?  I mean can you stop the trailer with the dash controls?

 

On the Denali when Tow Haul Mode is selected the dash display changes to pic below, trans temp gauge up right and gain at bottom bracketing the odometer.  No gain is showing because no trailer is connected.

[Popo1984]

No. Even when manually activating brakes on dash with IBC it does not apply brakes. All my lights work. Just no brake control options pop up and they don't work. 

[Z45]

Friend is a tech and he just told me they have seen an increasing number of these with broken wires in the harness,  new trucks with low miles.    Said he worked on one last week that would not work and they found the wires were broken.  VERY thin wires in the harness.  Could be the issue although he said this GMC would throw a message in the display,  "Service Trailer Brake System" every time truck was started.  He said the controller is located at rear under the spare tire.

 

PS - GM will not allow them to replace the harness, must repair.

[Popo1984]

I posted this issue on Facebook and a friend commented he had the same issue. No controller function at all. There was a connection behind the spare tire they had to repair or replace to fix it. Guess Im just delayed a week. Good thing my buddy will let me store it at his place. 

[TJay74]

On 7/14/2018 at 12:18 AM, swathdiver said:

On vehicles with the Integrated
Trailer Brake Control (ITBC) system,
turn the trip odometer reset stem
until TRAILER GAIN and TRAILER
OUTPUT displays.

 

If that does not cause it to show up, take it in to the dealer to see if the factory neglected to activate that module.

 

I dont know what truck you are in, but my 2014 and my current 2016 Sierra with the OEM trailer brake controller dont have a stem on the dash cluster to turn for the trip mileage. My IPC is smooth with no openings, the trip mileage is controlled thru the steering wheel controls.

[Popo1984]

Same here. I dropped it off at the dealer today so they can check it out. 

[Popo1984]

So I just got a call back from the dealer. They state my truck does not have the JL1 RPO code. So it may be possible someone tried to add the brake controller later attempting to get the intergrated function, which we know it will not work that way. I bought this truck used a few months back but it still had the build sheet in it and window sticker. I'm almost 100% positive the window sticker listed trailer brake control as being an installed option on the truck. They are going to pull the build sheet and window sticker from my glove box and give me a call back. 

 

Kinda pissed I bought this truck used a few months ago because it has the standard size bed and I assumed it had the trailer brake controls since they are on the dash. I guess I can buy an aftermarket controller. 

[swathdiver]

2 hours ago, TJay74 said:

 

I dont know what truck you are in, but my 2014 and my current 2016 Sierra with the OEM trailer brake controller dont have a stem on the dash cluster to turn for the trip mileage. My IPC is smooth with no openings, the trip mileage is controlled thru the steering wheel controls.

That information was pulled from a 2017s owner's manual.  My truck is under the avatar, JL1 functions through the DIC on it too.

[Popo1984]

So, Final conclusion is there is no JL1 code, I have the trailer equipment package which does not include the intigrated brake control option. Apparently someone tried to install the factory switch in an attempt to get the option to work. So now I'm looking for an aftermarket controller to add to my truck. Any suggestions on a controller to get?