I have TPMS tire valves on my 07 Grand Prix. One is leaking air. I tried to remove it with a regular valve stem tool, and it doesn't work. On further inspection, it looks like maybe it have a slot for straight blade screw driver... if a press the valve stem down the screw driver could go in the slot. I tried this but it doesn't seem to work.
What's the trick?
These TPMS valve have been a pain. I had one break off last summer. Now this.
Thanks.