My bulb in my ASR traction control switch went out so I went and got a new one. I searched on here for the part number and couldn't find it so I figured I would post it up so someone looking for it will be able to find it in the future. You can take it apart and just replace the bulb but finding a bulb that size turned out to be imposible for me plus it is soldered in there. Oh and I dropped it and couldn't find it when I took it apart, ha ha. So anyway the switch part number is 10273877 and it's $30 from the dealer and a little less from gmpartsdirect. Hope this helps somebody out.