Offer applies to customers who currently own or lease a Ford Mustang. Competitive owners are not required to trade in their qualifying vehicle unless the vehicle is being delivered under the GM employee purchase program. Offer is available on finance deals only. Customer must have owned/leased the Ford Mustang for a minimum of 30 days prior to the sale of the new vehicle. For deliveries under those programs, the customer must have a competitive lease with a scheduled end date withing 365 days of the delivery date of the new vehicle. This offer can be transferred to individuals residing in the same household.