the problem is you don't have the 1st key used after the red when they programed it at the factory but since it will crank and not start on one of the key the dealer ship or a locksmith should be able to rewrite the immobilizer unit by using the red key and the key that will turn the engine over then add the one that doesn't so $500 is bs because they don't need to replace the immobilizer module . are you in no cal ?