Vehicle Services Department Claiming to extend my warranty on my 2003 vehicle...I smell a scam Plano Texas

I too recieved a pink letter claiming to extend the warranty of my 2003 vehicle from Vehicle Services Department. The letter insinuates that it is time sensitive and I must act immediately. It only gives about a week to respond. Seemed very suspicious to me since it does not include the make and model of my car, or any other details. They also claim they have tried to reach me several times. On top of that it is a second had car for me. I'm 65, and seem to be a target for many different scams...However, they haven't reached a person this time that would be so niave, or uneducated about such scams. I just feel it important to report any such scams to educate those that are more easily swayed and taken advantage of.