I believe the TPMS sold through Tire Rack is the same ones we have on ours (someone had posted it previously) -- that should save you some bucks if you decide to go with new TPMS instead of dismounting the tires off of your 18's to get the TPMS out of there.

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4.8|Sport Pkg|Prem Pkg|Cold Weather|Nav|PDC|Comfort Seats|Nappa Leather|Convenience Pkg|Rear Climate|3rd Row|HUD|SAT Radio|HD Radio|Dual-Monitor Rear DVD Player.