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

ftb3 · April 23

2 hours ago, matt99199 said:

No, you would have to splice all four of those into one wire that feeds into X1 pin 1.

So confused, X1 know when it's door open, left turn signal, right turn signal and 'running head lights'?

matt99199 · April 23

My bad, I forgot the prior conversations.

For your application you have to T-tap off of the other three signals you need for your application.

Only one of these pins is needed to breakout the dome light signal for any project.

The others will be different wires that are already populated for right, left, parking, etc lights.

ftb3 · April 24

13 hours ago, matt99199 said:

My bad, I forgot the prior conversations.

For your application you have to T-tap off of the other three signals you need for your application.

Only one of these pins is needed to breakout the dome light signal for any project.

The others will be different wires that are already populated for right, left, parking, etc lights.

awesome, and i can actually t-tap off of this for the left running board light.

Thank you so much!

Grjfer · April 24

@matt99199 do you know if the X1 and or BCM layouts are the same for the 24 Denali HD's?

matt99199 · April 24

40 minutes ago, Grjfer said:

@matt99199 do you know if the X1 and or BCM layouts are the same for the 24 Denali HD's?

No idea, but I can imagine GM probably only designed one BCM and ELM for their trucks.

If you look up above your left foot and see two modules then its a safe bet.

Jimmyle · April 28

Hi there?i have 2024 gmc sierra , I want hook up door step ligt. But i dont know what are B BCMand ELM colors and pins numbers for the doors lights. Please help? Thank you so much

DwDrummer · August 2

Just wanted to confirm this is the correct location? My truck is a 24 Sierra Denali.

Thanks,

DW

matt99199 · August 2

41 minutes ago, DwDrummer said:

Just wanted to confirm this is the correct location? My truck is a 24 Sierra Denali.

Thanks,

DW

Yep, top left, its upside down in the pic.

DwDrummer · August 2

Thanks Matt! The white clip will it come completely out, I got it to release but didn’t want to break it lol.

matt99199 · August 2

1 hour ago, DwDrummer said:

Thanks Matt! The white clip will it come completely out, I got it to release but didn’t want to break it lol.

It can but it doesnt need to, it only needs to slide out a tiny bit to let the wire in.

Luckily even if you break it, it will be held in by the connector housing once reinserted so its fine if it breaks its retaining ends.

Edited August 2 by matt99199

DwDrummer · August 2

33 minutes ago, matt99199 said:

It can but it doesnt need to, it only needs to slide out a tiny bit to let the wire in.

Luckily even if you break it, it will be held in by the connector housing once reinserted so its fine if it breaks its retaining ends.

Thanks!

Edited August 2 by DwDrummer

DwDrummer · August 2

I know you made a plate to do your led strips and that worked out great, I was planning on buying these 3” footwell lights but not real sure where I can mount under the driver side dash with the 3M tape that comes with them. Any ideas lol?

Edited August 2 by DwDrummer