P245/40ZR18 front and P285/35ZR19 rear, performance, run-flat, summer-only tires1

Standard tires. 1 Do not use summer only tires in winter conditions, as it would adversely affect vehicle safety, performance and durability. Use only GM®-approved tire and wheel combinations. Unapproved combinations may change the vehicle's performance characteristics. For important tire and wheel information, see your dealer for a copy of the vehicle's owner's manual.