I was wondering if rims with a bolt pattern of 5x100 and 5x114.3 and a offset of 42mm would fit on my car???

I would appreciate some feedback

 

Nope. You need a wheel with a 5x110 bolt pattern. All SS and SS/SC models use this bolt pattern. Your in the same boat I was in.........I wanted dozens of different wheels, and much to my dissapointment, none of the wheels I had originally chose fit my Cobalt. I ended up settling for a decent wheel (18x7.5 Enkei WDMs) but still not exactly what I wanted, but they'll do for now. I might get some custom drilled 19" Falken Circut Spec's in the future, but I need to figure out how expensive custom drilling is first, and where I can get it done.

 

^^ as ed mcmahon would say "you are correct"