spark plug replacement

You can locate a shop here and call and get a estimate over the phone http://repairpal.com/chevrolet-repair-in-new-city-new-york

Well, that is only a start. The spark plug replacement is part of the tune-up for the car, and you that is what you need for that. And a tune-up can cost you between $200-400 depending on where you go to get it done. Don't take it to a gas station though...they are very expensive. You can take it to your dealer. Also you can call around to ask how much a tune-up could be.