the warranty is for EVERY 2007 and up GM vehicle. If you had your truck before the announcement, you automaticly get the 100k warranty as long as it is a 2007 model year. As far as the extended warranty you bought, It is a good idea to keep, because this will cover a/c components, power window motors, and all of the other stuff that the factory extended warranty will NOT cover after you get outside of 36,000 miles. Hope this helps!