From OP: Car Type

I would guess that it uses the same TPMS as a similar vintage Impala, which uses sensors at each wheel integral with the valve stems. If you rotate your tires, you do need to reprogram the system if you want the pressures to read correctly for the correct wheels. You'll need to have an air compressor handy because it involves deflating the tires slightly in sequence. The exact procedure is in the owner's manual.

good luck

nate

Mine is Toyota.. You simply adjust all the tires to specified levels, and then actuate the system calibration. As Nate says, check the owners manual.

Mine also checks the spare, so if you get an odd reading, dont assume that you automatically have a low main tire.