2004 Cavalier Ls help needed.

I have a 2004 chevy cavalier ls with the chrome wheels. Looks like these
http://www.caranddriver.com/cars/3975/chevrolet-cavalier.html

Well, I lost the owners manuel and I'm not sure how much air I'm suppose to put in the tires. If anyone else has these rims/tires, a little help will be much appreciated.

Thank you.

Look at the tire. It will say on it how much air (PSI) to put in them. Most tires on average take around 40-45psi though.