When I bought my 2017 GMC, I also bought the extended warrantee. Every since then, I have been getting phone calls trying to sell me more warrantee "before it's too late." Usually I just hang up. Then a couple of weeks ago I get a card in the mail that looked all official stating that I needed to bring my truck in for service mantainance before it is too late and to call a phone number. I haven't used the vehicle much in the last few months, so the oil change is overdue by time, but barely has 2000 miles on the oil. Well, I thought that GMC was nagging me to change it or void the warrant. I get to the shop for an oil change and show them the card. They have no idea what it is. Scammers!!!