there is a Hole already installed in yur lumina were all your wires from steering wheel go through at you should see it, it will have a rubber plug in it, dont remove the plug pain in the ass to put back in but simply get a coat hanger and attach sub wire to one end and run other end through the side of the plug it will go right through without damiging the plug and will also let the plug seal the hole after the wire is run through