The dealer sticker on my 2002 cavy says that it's a z24, but it's an LS Sport. The last z24 production year was '01 (no z24 on chevy's website anymore). Check and see if the z24 logos are on the car. A better idea is to pop open the hood and see if it has a 2.4 engine common to the Z24 or if it has the 2.2 Ecotec (about a 10hp difference between the two, both are DOHC). Some uncrupulous dealer might simply place z24 logos on an LS Sport, although the reason for that eludes me.
Of course, the car might be an '01 model.
