[piecesparts]

I spent some time with my parts guy buddies at the local GM dealership, this evening. The stem is a rubber one and the TPMS sensor connects to it with a screw. The stem and a new screw costs about $10.00 over the counter and when installed you can use your sensor from the original wheels and NOT loose the computer connection. The complete setup, the stem and sensor sells for about $57.00, if needed. Finally a GM engineering idea that is useful.