Changing stock 01 sunfire to aftermarket?

Just wondering if I am going to have to buy some 150 dollar module to allow me to change out my deck, I know my friends 2000 sunfire had to have the module, any of you guys know for sure? Also anyone know what it is actually called so I can see if maybe ebay has them for cheaper.

Thanks

Tim

don't know for sure, check the Chevy forums ... they would have more specific info.