TPMS Reset Procedure:
Turn the engine on to keep the battery charging.
Hold down the lock and unlock buttons on the key remote for 5 seconds, you'll hear the horn chirp twice and the DIC will say something about the procedure.
Go in this order and add/subtract air from the tire. The horn will chirp once to let you know when to stop letting air in/out.
Front left
Front right
Rear right
Rear left
After the rear left has been done, the horn will chirp twice, and you're done.