Trailer Wiring harness, special part?

[beard_up]

My truck did not come with the trailering package, but I have a "harness" behind the plate on the left side of my tag. I recently bought a Reese hitch setup, but have run into a problem.

 

Do I need some kind of special adapter to plug into a standard 7 way harness? Or will I forever have this gaping hole next to my tag?

 

I may be an idiot so any help will work.

 

 

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[8.1HD/ALLISON]

Should be able to get a 7 way trailer connector that plugs into that harness.

 

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[beard_up]

The harness I got came with the right adapter.

 

 

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[chuckl1218]

The harness I got came with the right adapter.

 

 

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Having trouble following what the issue is...you don't have the GM plug above the bumper and got an after market one, correct? The GM plug is now a combo with 4 way flat and 7 way round in one connector (two covers). Is this the issue?

[chuckl1218]

This is what mine looks like...

 

[beard_up]

This is what mine looks like...

 

IMG_0744 copy2.jpg

 

I have the harness behind it, but i don't have the actual piece. Mine is just blank, with the harness behind it. What would you call that part? I want yours.

[chuckl1218]

 

I have the harness behind it, but i don't have the actual piece. Mine is just blank, with the harness behind it. What would you call that part? I want yours.

I would call my dealer parts guy and ask him for the part that is the trailer combo plug on the bumper side.