For everybody out there who has an aftermarket receiver in their catera do your controls on the steering wheel still work? If so was this a big deal or is it all hooked in to the wiring harness?

not sure about the catera.. but on my 99 grand am gt, the steering wheel controls would not work with an aftermarket deck unless you bought a separate $50 module. But I am not sure if the module is even option for the Catera.