This what I learned here.
2005 - no TPMS - lucky son of guns!
2006 - 2008 TPMS on all 5 wheels
2009 - TPMS on 4 wheels none on spare
The sensors are different on the oem alloys & steelies.
The sensors have ids on them
On the 2006, there is a disable mod splicing a fuse into wiring behing the glove compartment. I haven't done it to mine even though I bought the stuff (less than $5) deciding not to mess with the system.
Not sure the mod works for 2007+ but there has been documented macgyvery done by some folks as a work around.
My spare threw a light recently which I lowered, added air, flipped around so future checks would be easier to deal with. It made me wonder if the dealer does this when brought in for service? Also I contemplated if it was good for the tire to have the sensor facing down but figured the other sensors are exposed it would be ok.
Thats what I've learned here.