I have a 2008 CTS and my front door will not open when pulling on the door handle. The only way to open the door is by putting the key in the door handle. I am also able to open the door when inside the car using the inside door handle. I do not have the key fob that opens the door when you walk up to the car instead I have to click the unlock or lock button on the key fob. I hope someone could help so I don't waist money buying parts that is not the cause.