Since GM no longer provides floor lighting, we have to do this on our own. With people asking questions lately, here is a quick "how to"......
Start off by finding an area where you want your lights. I ran my passanger side LED strip on the bottom of my glovebox.....Run your passanger side light wires over to the driver side behind the lower dash plastic. Be sure to leave yourself plenty of wire to work with later.
You need to remove the black plastic cover that covers the distribution block on the driver side firewall.
See below pic.
Once the cover is removed, you want to unplug the BLACK harness. Unplugging the needed harness makes it much easier to splice into and gives you plenty of room to work.
See below pic.
The wire needed to give you power and to control your chosen floor lighting with the interior dome lighting is GRAY. There are two gray wires, either will work so it doesn't matter which wire you tap into. Connect your positive wires from your lighting together and splice them into either GRAY wire from the BLACK harness you unplugged earlier.
See below pic.
After you have your positive lighting wires spliced into the GRAY wire from the BLACK harness, you want to connect your ground. Connect both negative wires from your lights together and ground them to a firewall stud....
See below pic.
I used the bolt that is attached to the gas pedal, it was closest and easiest.
You can now attach your driver side lighting in the location of your choice. Zip tied with other wires works well.
See below pic.
Don't forget to replace the black distribution block cover when you are finished and turn your dome light switch back on.
My finished product!