If you think that price is good look at eBay.
1 Dorman Tire Pressure Sensor TPMS w O Nut 974 009 Used 314B54 | eBay.

Donbrew, Used.... I've got 4 factory used ones I would sell for less than that! LOL

I won't even say "should have used search".
https://www.chevyhhr.net/forums/tire...-number-42221/

I've had the one set since I bought the SS in December of '14 (the factory ones were staring to randomly loose signal). The other set month or so later when I bought another set of wheels for winter tires.

How many of you have converted to using the rubber valve stem style? Are there any issues involved in swapping these?
I know they won't look as good, but GM must have mad the change for a reason... Other than just cost :lol:

Still wondering if anyone has converted to the rubber valves on the SS wheels?

Also, has anyone tried Tire Racks Generic TPMS? I believe they are Siemens.

Not me, I've been blessed to have an '07 LS! No TPMS and no VVT!! Oh what a relief that is!