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2022 GMC Sierra 1500 and others BCM footwell lighting pinout - Denali Doorsill Install Info

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On 1/28/2023 at 7:38 PM, RafaelLujan said:

Im trying to install the same illuminated door sills on my 2022 Refresh Denali as well and this thread is definitely helpful! I do have one question though on how the wire harness that comes with the door sills gets its power.

There is a grey wire on the harness that has some sort of connector. If I’m understanding your thread correctly, I literally just pull the black X1 connector from the BCM, open it up and push the connector from the wiring harness into the “1” slot? No t tapping or anything like that with this harness? Thank you for your help!

Sorry for the late response but yes its that simple. Just getting to it is a pain and dealing with that locking clip.

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On 1/30/2023 at 7:24 PM, Chronister Enterprises said:

I have tried for an hour to get the wire from the sill into the #1 port on the black X1 and it goes in but you cannot put the plastic retainer on it. I have flipped it over multiple time to try different angels. Not sure why this picture shows a different port than number 1. Any suggestions on how to get it pushed in far enough to get in the white retainer clip?

The picture was reference only on the process since I had another type easily accessible. These pins are sometimes very difficult to get that final push and may require a very small flat head to chase behind and drive home (or use some needle nose gently on the wire to put some force into it to get it to seat).

Also make sure that locking tab is either fully removed or properly popped out enough.

What can also happen is that raw exposed pin they have flapping around in the box can get ever so slightly bent and make it harder to insert.

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Posted (edited)
On 10/12/2022 at 5:25 PM, RedLT said:

The pin 1 does it output 12v?

When you remove yours can you get pics and give details how you went about removing the lock, I've not removed one before so any tips or know how  on the actual one on the vehicle will be most appreciated.

After using this pin a while I can confirm its a 12V PWM dimmed signal. It may or may not be a good idea to use a relay with it as it could induce audible relay chattering. Probably OK but havent tested it.

I ended up running my door sills and 4 seats of footwell lights no issue directly however.

Edited by matt99199
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On 1/31/2023 at 7:53 AM, RafaelLujan said:


I haven't started my install of these yet, but when you push the gray wire terminal into the X1 #1 port, are you getting the "click" sound when the terminal locks in to the x1 connector? This is what I would think would happen 


It may or may not click, the real test is if light force wont cause it to come out and if the locking tab reseats perfectly flush again to the connector housing.

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Sorry all, for some reason I didnt have notifications turned on for my own post....

I'll share some finished product pics soon.

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This is how my install turned out, T tapped off of the door sills once installed and put RGB strip with a fancy controller for it all. Turned out great.





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