Jump to content

OEM trailer brake controller and wiring

Saldog

By Saldog
in Modifications & Accessories

 Share

Recommended Posts

tbarn Senior Enthusiast

tbarn

Posted
Posted

They pretty much all have the harness from what I remember.

  • 2 weeks later...
  • Replies 33
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

Matthew Kashima
Matthew Kashima

I Think it can be done. I was taking the panel off where the light and 4wd dials are it it looks that it is wired in my truck, but it does not have the controller. I found the controller and the panel

TJay74
TJay74

Man are you seriously that dense to push aside everything that was posted in this thread. I can promise you and will guarantee you that your dealer will absolutely not be able to do one thing to get t

RGH1978
RGH1978

Not to discount anything that TJay74 is saying but If I were you and already had the part I'd give it shot. What's the worst that could happen? The dealer sends you home and says it won't work and you

Z71 _ GMC Enthusiast

Z71 _ GMC

Posted
Posted
On 4/4/2021 at 5:51 PM, C Bass said:

I know this is an old post from the dates but I just wanted to see if any others were still on this subject. I have a 2014 Silverado 1500 Z71 LT with the 5.3 v8 and 3.42 rear end. With that being said I too was looking to get the factory trailer brake installed if it was at all possible. Well after reading here and going to 2 different dealerships and having my VIN ran to see if there was a kit I was told "No". So I went and got an aftermarket one to install myself (plug and play). Because i didn't want it down by my knees i designed to put it in the slot the factory would go since it was small enough. Upon pulling the panel to start the installation and fabrication I was shocked to see a wiring harness plug attached to the plastic (holder) directly where the factory would plug in. I went to a 3rd dealerships and informed them if what I found and to their disbelief and interest ordered a factory controller and panel just to see if indeed it is wired for it. I will find out Tuesday afternoon if indeed this is true. So long story short if you so happen to have a Silverado 1500 with the 3.42 rear end if you don't have the factory trailer break try removing that panel and seeing if that wire is attached like mine was. I will update this after my visit to the dealership Tuesday. 

Which PnP controller did you use to fit in the factory slot?

mikeyk101 Senior Enthusiast

mikeyk101

Posted
Posted
On 4/4/2021 at 5:51 PM, C Bass said:

I know this is an old post from the dates but I just wanted to see if any others were still on this subject. I have a 2014 Silverado 1500 Z71 LT with the 5.3 v8 and 3.42 rear end. With that being said I too was looking to get the factory trailer brake installed if it was at all possible. Well after reading here and going to 2 different dealerships and having my VIN ran to see if there was a kit I was told "No". So I went and got an aftermarket one to install myself (plug and play). Because i didn't want it down by my knees i designed to put it in the slot the factory would go since it was small enough. Upon pulling the panel to start the installation and fabrication I was shocked to see a wiring harness plug attached to the plastic (holder) directly where the factory would plug in. I went to a 3rd dealerships and informed them if what I found and to their disbelief and interest ordered a factory controller and panel just to see if indeed it is wired for it. I will find out Tuesday afternoon if indeed this is true. So long story short if you so happen to have a Silverado 1500 with the 3.42 rear end if you don't have the factory trailer break try removing that panel and seeing if that wire is attached like mine was. I will update this after my visit to the dealership Tuesday. 

I'm guessing you didn't take the time to go through this thread. Yes, the wiring behind that panel is there. Yes, the controller is available. But there hasn't been anyone successful at getting it to work. And this is after several years of owners trying...

  • 5 months later...
kensampson New Member

kensampson

Posted
Posted
On 3/21/2015 at 9:05 PM, darkfox1 said:

This is the way it was in the GMT-900 too iirc.

 

The wiring is there though. If you want to work with some aftermarket BCM programming folks to see if they can enable it... but there's no guarantee it's ALL there.

 

Don't know that GM can no longer re-do the BCM. Just a few weeks ago I spoke to a dealer who said they could reprogram my BCM to accept factory fogs despite there being no RPO for them on my truck.

 

http://i956.photobucket.com/albums/ae50/darkfox118/100_5805.jpg

 

Note the top harness plugging into the empty pocket where the switch goes.   and where is the other end ive looked  everywhere for it

 

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Atlas
      Gas Prices

      By Atlas · Posted

      87 down as low as $5.14 here... winning!
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      Progress... sort of.   Intake is disassembled, spider is out, fuel lines removed. Used a torch on the stripped screw with the lower intake off, much easier when I've got the intake sitting on my workbench, I made it talk. Walked right out with a pair of vice grips once it was nice and toasty hot.   New parts are piling up on my service cart waiting to be installed. Distributor, temperature sensor, new gaskets, fuel line kit, themostat, water neck.   My new pickle is I don't want to spend $600 on a replacement spider. I'm not sure IT is bad. I'm probably splitting hairs. Or it's $300 to send mine away and another 3 weeks of the truck just sitting. I have half a mind to assemble everything with the old spider to see if I can get away with just replacing the fuel pressure regulator to be safe. The obvious issue was the gushing high pressure fuel line which will be replaced. Getting to the spider really isn't that hard, and now I know what I'm doing , swapping it would be a breeze should it absolutely need one. Stupid, or smart?   The part that gives me pause is replacing the distributor. Well, it's already out. And I didn't mark it, whoopsie! Engine was at TDC when I removed it, I know that, so upon correct reinstall the metal tip on the rotor should point to the TDC mark on the distributor because that's where it was pointing on the old distributor. Worst case I'm a tooth off and have to re-stab it.   But then, what? I assume the truck will start. It doesn't appear the timing can be set. Here's the problem: These distributors can't be rotated but a degree or two, by design. What I read is Cam ****** needs to be -2 to +2 degrees, ideally at 0 (and checked/set above 1000 rpm). There should be enough wiggle to get that properly set, but checking the reported value is another potential issue. My Actron 9185 scanner says it supports enhanced GM PIDs and Cam ****** is one of them but it's unclear that I'll be able to correctly see it over OBD 1.5. I can see why people end up junking these things with life left in them. They're an absolute nightmare with tweener-year diagnostics/electronics and unobtanium parts.   Fingers crossed it starts and idles nicely. There can be hope, right? I'ma buy a lottery ticket the same day just in case.   Next steps..DO IT. I have not installed an intake before so I've been reading and watching a lot. Some say NO RTV except on china walls, some say DO RTV on water ports but not fuel/air intake. 1/4 or 3/8 bead on China walls? I think my strategy will be, obviously, RTV china walls with overlap on the gasket corners. Chapstick-style RTV the water ports. Leave intake ports dry. The only set of intake gaskets I could find locally are Edelbrock performance gaskets (uh...for an asthmatic 190hp V6? LOL) so we'll see how they do.   #NoToolLeftBehind. It took an hour, but my recovery mission for my deep 10mm socket was successful. It had rolled down the bellhousing and wedged itself between what I think are the fuel lines? I couldn't see it at all, but with a junk antenna I had laying around, I blindly went poking/sweeping for it, heard it clink, raised the truck, and caught a sliver glimpse of chrome with a flashlight way up there in Narnia. I had pushed it farther along the lines holding it captive, but within access of severely improvised tools, poking and cursing at it to finally knock it free to where I could get a fingertip on it to bring it home.    Not much to see.      
    • RyanbabZ71
      Gas Prices

      By RyanbabZ71 · Posted

      Thats crazy considering im right next door (Indiana)
    • Black02Silverado
      New Retail & Commercial Promo

      By Black02Silverado · Posted

      For a limited time, retail and commercial accounts receive an AMSOIL Vinyl Tool Tray with their order of $500 or more when they use code TRAY726 at checkout. The promotion runs through July 21, 2026.   Order at https://syntheticadvantage.com   Want to use AMSOIL in your business or sell at your store, apply here.  https://www.amsoil.com/business-opportunities/?zo=521390  
    • KARNUT
      2027 GMC Sierra: Official Discussion

      By KARNUT · Posted

      It wouldn’t have happened if the government hadn’t mandated outrageous fuel mileage standards. It does very little for the consumer. It adds cost. Back during Covid there was a chip shortage. They gave a rebate for your truck if it didn’t have the chip to turn on cylinder deactivation. It was 50$ because at best you may see 1/2 a mile increase per gallon. Splitting hairs each fuel mileage trick wasn’t mandated. The government doesn’t do the engineering work and say use this until it’s already in use and they like it. The fuel mileage was mandated. And those add ons the results. There’s a mandate and they are the results.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...