Aftermarket Brake controller 1999-2006 GM trucks
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In this page we will illustrate how to install an aftermarked brake controller on 199-2006 GMC Sierra, 1999-2006 Chevrolet Silverado, 2002-2006 Chevrolet Avalanche, 2000-2006 Suburban, 2000-2006 Tahoe, 2000-2006 Yukon, 2000-2006 Denali, 2000-2006 Cadillac Escalade, 2003-2006 Hummer H2.

The Truck we are working on is a 2000 GMC Sierra, although these steps also apply to the vehicles described earlier. This particular truck was equipped with a factory towing package, this made the installation of an aftermarket brake controller very easy, the owner of this truck needed a larger plug for the towing lights, we included the conversion from a round 6 terminal outlet to a larger 7 terminal outlet.

The parts we used for this job were:

- HOPKINS Brake controller part number 47235

- HOPKINS Plug-in-simple adapter part number 47795

- HOPKINS 7 way vehicle side connector part number 48480

 
   

   

   

   

   



   

   

   

   

   

   

   

  

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Locate the black junction box underneath the dash on the left side of the brake pedal, remove the plastic nut as shown in the image and remove the cover.

 

 

 

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 We mentioned earlier that this particular truck is equipped with a factory towing package, we plugged in the plug-in-simple adapter into the second port in the top left corner of the junction box as shown in the image.















Next, we  installed the bracket that holds the brake controller under the dash using 2 bolts, 2 nuts and 2 locking washers.














The next step is to plug the plug-in-simple adapter into the aftermarket brake controller.














Using the two screws provided in the package, we fastened the brake controller to the bracket, that's how simple it is to install an aftermarket brake controller in a GM truck equipped with a factory towing package, using a test light, activate the brake controller and verify that the power is being sent to the outlet through the blue wire.






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We mentioned earlier that the owner of this truck needs a 7 terminal outlet instead of the small 6 terminal that came with the truck, the first step is to remove the retaining screws that fasten the old plug to the truck's frame as shown in the image.

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 Next step is to remove the small screw from the bottom of the plug as shown in the image, with the screw removed, slide the wires through the plug.

 

 

 









Next, remove all the wires from the old plug, keep them away from each other as you do this.

















Slide the back cover over the wires and proceed to install small round terminals on all the wires as shown in the image.











Next, install the wires in their respective locations, the plug comes with instructions and is clearly marked for the correct location of each wire.

You will need a test light to find out which wire is the brake, tail lights, turn signals etc. on your truck.
The truck we are working on has the following color coded wires:

-White wire = Ground
- Yellow wire = Left turn signal
- Brown wire = Tailights
- Light green wire = Reverse lights
- Red wire = Auxiliary
- Dark green wire = Right turn signal
- Blue wire = Electric trailer brake









Next, mount the retaining bracket to the frame.

 

 

 

 

 

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 Slide the wires through the small opening of the mounting bracket and fasten the electrical outlet with the nuts and bolts provided in the package.

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Insulate the wires with plastic wire liner and electrical tape, install the retaining screw at the bottom of the outlet as shown in the image, connect the trailer to the truck and verify that all the lights are working correctly, if they are working correctly as they should be you are done.