We have Full warranty until 2022 see it is all on GMs dime
For me the dealer has been pretty good it was their suggestion to dig further into it even though they found nothing wrong with tires and visual check and a test drive, so far they are willing to go the extra with out hesitating. but then again we bough3 vehicles from them so far in the last 2 years. truck, sons car and daughters car. each time we have had no issues with any requests. If it drags on I plan on just keep on returning and documenting the vibration no getting up set each time just stay polite. service advisor called to apologize today for not having a solution and if it was OK too keep it longer to hook up the test sensors. As long as they seem to be trying to help that's is Ok as they know we will be back next year for a new car for my wife. So far I am on good terms with the sales manager, finance manager as well as the service manager
not sure why I see line in everything sorry...