I recently purchased a 2012 Coupe. It is the base model, but it fits my needs except I would really like to have the factory remote start. I have seen kits on the internet direct from GM and installed by GM, but when I enter my car as a coupe they disappear. Found for sedan and wagon, but not coupe. Car is CTS 4 Coupe A/T and leather, but no heated seats. Thoughts on if these kits will fit?