Tekonsha Prodigy P3 Trailer Brake Controller Installation - 2016 GMC Sierra 1500

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How to Install the Tekonsha Prodigy P3 Trailer Brake Controller on a 2016 GMC Sierra 1500


Today on our 2016 GMC Sierra 1500, we're gonna be installing Tekonsha's Prodigy P3 Trailer Brake Controller, and with this we'll be using Tekonsha's plug-in wiring adapter.This is a premium trailer brake controller. It's gonna allow you to proportionally apply the brakes on your trailer depending on how quickly you're stopping here in the vehicle. It uses an inertia sensor inside, so the harder you stop inside, that inertia sensor detects it and applies the brakes appropriately to match that on your trailer.Your output can be adjusted here on the left, and you can select through various boost settings with the button on the top right. The boost settings are for adjusting for the weight of your trailer. If your trailer is a little bit less than the weight of your vehicle, you'll wanna use the boost one setting. If it's roughly the same weight as your vehicle, you use boost two.

And if your trailer weighs more than your vehicle, you'll wanna use the boost three setting. That'll help make sure that the proportional braking is most appropriate for your setup.There's a setup menu, using the button on the bottom right, that will allow you to adjust the display output, the type of brakes on your trailer, whether it be electric brakes or electric over hydraulic, and some more information in the help setting.What I really like about this brake controller is that if you hold down the boost setting it'll bring up a trailer selection menu where you can store up to five different specific settings for various trailers. So if you've got a small trailer you can set that to trailer one, if you've got a larger trailer you can set the settings up for that on trailer two. So all you have to do is, when you hook up your trailer, just pick the appropriate profile for that trailer and hit the road.We'll begin our installation by plugging in our wiring adapter. You'll need to access the fuse panel in the lower left kick panel on the driver's side.

You'll need to release the lock tabs here on each side to pull your cover off. I find doing the left side first a little bit easier because it's harder to get to. So you can get your screwdriver in there to release this tab, and then it makes it easier to reach over and pull these tabs off.We can now plug our harness into the fusebox here. We're gonna plug it into this spot here, just above this large connector opening, into the small one right there. And now we can route that wiring over to where we'll be mounting our brake controller.We can now reinstall our cover.

The wiring can poke out the top with all of the other wires, so we just tuck that back, and then slide our cover back on.Now we'll wanna mount our brake controller. We'll start by mounting our bracket, we're gonna be putting it in about this location. We'll use the screws that come with our kit, which will require a quarter-inch socket to thread those into our lower part of our dash here. We're gonna go ahead and get our bracket about where we want it, and I like to center the screw in the slot on the bracket so we've got movement back and forth if we need it in the future. Those will just run right in.

Once you've got one in, you can make sure that it's sitting fairly level, and put your second screw in.We can now mount our controller in our bracket. We're gonna use the machine screws that come in our kit to thread it into the bracket there. There's only two holes, one on each side, so we're gonna line that up with the holes in our bracket, and we're gonna start it on one side, then we'll start it on the other side. Then we'll tighten down the screws with a Phillips-head screwdriver. We can then bring our wiring over and plug it into the back of our controller. You can then use some zip ties to clean up your wiring. You can pick up some zip ties here at etrailer.com.With it all installed, we can now plug it into our trailer to test it out. You'll know it's working when you push the manual slider and it shows that there's a trailer connected. So right now, you can see it says no trailer connected, so we're gonna go plug it in. And now that we've got our trailer connected, you can see that we're displaying a voltage readout for how much voltage is going to our trailer brakes.And that completes our installation of Tekonsha's Prodigy P3 Trailer Brake Controller on our 2016 GMC Sierra 1500.


Questions and Comments about this Video

Bret

My trailer brakes worked for 2 years perfect. Now my P3 manual brakes work but my brake pedal doesn’t register on my brake controller, what’s wrong?2008 HD Chevy 2500, 2018 Attitude 5th wheel.I bought a new P3 brake controller that didn’t fix it.I bought a new brake switch, which attaches to my brake pedal, didn’t fix it.I have current in the blue wire to my trailer.Brake store manager thought it might be a battery wire and replaced it, didn’t fix it.Think I’m going to see if they can replace wiring harnesses next, I’m not sure.Thanks

Etrailer Expert
Reply from Rachael H.

Sound like you have a good start on the troubleshooting so far. To confirm if the wiring harness needs to be replaced you can test the RED wire on the wiring harness from your truck to your brake controller while activating your truck brakes. If you do not get a signal on the this wire then I would replace the wiring harness. Just in case you might also want to check any towing package related fuses or the CHMSL fuses. For many GM's the CHMSL fuse is tied to the red wire on the brake switch from the vehicle pedal. I have also included a couple of help articles that explain some additional brake controller troubleshooting items. The P3 is a proportional brake controller so it will activate the brakes in relation to how the vehicle is braking based on the inertial sensor in the controller. If this is the first time towing/testing with your 5th wheel trailer and this controller let me know and I can pass along some set up info. I have also included the installation instructions for the P3 for your reference.

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