When swapping stock steering wheels for a monte carlo or similiar wheel with radio controls how do you know what module you need for it to all work. Been looking at www.Pac-audio.com. Do I just enter the info of the donor vehicle to figure out which module to buy? I know the model/brand of the radio plays into it to. Planning on upgradeing the wheel with controls and the deck at the same time. Thanks for any help fellas.