Passenger air bag sensor did not detect a passenger in the seat, had to pay $$ to have this replaced. on star red light was also on then green on & off. on star said it a communication failed & with the accident notification. the car was checked at dealership same time the air bag sensor was checked. then checked 2 more times since. the dealership could not find the problem & told us they would have to take dash & console out to find problem at our expense & our expense for a diagnostic again. we now have the car at a different gm dealership that has a testing instrument for the antenna and. it charging us for the diagnostic. we bought this car off show room at dealership for our daughter to have a dependable safe car to get her through high school & college. no the extended warranty hasn't covered any of this. *tr