I just got a 91 LS sedan and I'm trying to determine if it has a keyless entry system. I only have one master key and one valet key. The security light on the door does not work when I lock the car so I don't know if it works. Did the 91's have a factory keyless entry system? Was it an option? I see remotes for sale on Ebay but the seem to reference on the 92-95 models. Does anyone have any insight here?