Unknown Plugs Behind Rear-Bumper?

nathan.reimers.33 · April 17, 2015

So I was installing a hitch adapter yesterday and found these random (and empty) sockets for something. I researched but can't find anyone that's posted about them yet. I have two empty ones right next to the spare tire behind the rear bumper. Any idea what they're for? You can't see the left one in this picture, but there's the right one.

fondupot · April 17, 2015

Do you have backup camera or rear parking sensors?

Ridersfan · April 17, 2015

Maybe the under rail bed LED lighting?

Asells · April 18, 2015

Maybe the under rail bed LED lighting?

Correct, under that black cover, thats where the bed lights plug in.

darkfox1 · April 18, 2015

Correct, under that black cover, thats where the bed lights plug in.

Wait so these things are just straight up plug n play?

Asells · April 18, 2015

Yup as long as you have the light kit. Mine didnt come installed so i did it myself. Super easy

darkfox1 · April 18, 2015

Does this port then, connect to the cargo light switch?

Asells · April 18, 2015

Yes they will come on with the overhead bed light

chuckl1218 · April 18, 2015

See this topic for more information including a diagram of the terminal block in question in post #30...

http://www.gm-trucks.com/forums/topic/153192-led-under-rail-bed-lighting/page-2?hl=bed%20led

The thread also has the GM kit number and links for purchase. Some of us had the original kit installed and ordered a second kit to add on 2 more LEDs (kit comes with two, we added two more). This was a very easy project.

nathan.reimers.33 · April 21, 2015

Yup as long as you have the light kit. Mine didnt come installed so i did it myself. Super easy

You don't happen to have the part or description for the light kit, do you?

Bassinz71 · April 21, 2015

For those of y'all that added lights, what did you do for a switch?

thecobra · April 21, 2015

For those of y'all that added lights, what did you do for a switch?

Really man?

Yes they will come on with the overhead bed light

Bassinz71 · April 21, 2015

Really man?

Wow, I must have missed that post. Please forgive me.

chuckl1218 · April 21, 2015

You don't happen to have the part or description for the light kit, do you?

Please see the link in my post above...#9...it's all in the link I provided...

darkfox1 · April 23, 2015

So, I decided to try something with this.

For those of you planning to add under rail bed lighting, your own design or GM's official design, or you have other plans (in my case, I want to connect my LED reverse lights to this, if it wont blow the fuse..)

I ordered PN 22878806. This is the harness that connects to plug X6 (the one in question in this thread.)

From teh intarwebz.. theres 2 pinouts in it in pin slots 4 and 7.

http://sandyblogs.com/techlink/?p=3659

The instructions past that point start sounding like a foreign language to me, but from what I understand one is power and one is ground. (From the writeup it sounds like pin 7 is power and they're using a local ground somewhere in their instructions.)

The harness in question has a list price of $41. I picked one up for $38 shipped from GMPD. I'll take a pic of it when it comes in.

My idea is to use the cargo light switch to run my reverse lights. I have a set of 18w "Cree" LED lights I bought off amazon for $23. They may not be great, but for $23.. I dont know if I care too much.

My biggest concern is that I'll blow a fuse from pulling too much power.