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Remember this can be done as long as you have 1 month and 1,000 miles left of the original GMPP plan. Some other facts to know that as of October 1st, 2014 only a 2008 and newer can be extended with a Major Guard plan so 2007 and older can only be extended with a Value Guard which is one step down from a Major Guard. Also you vehicle must be less than 75K for miles.
If you would like me to check things out for an extension please email me at dfichtner@hardinauto.com, please send me your VIN, exact current miles and state of Residence. I may be reached also at 406-545-7000 or my personal cell of 406-698-6355.
This does not only include Vettes so if you spouse has a Tahoe, Suburban, Malibu, etc. I can also do them.