Tires, P225/40R18 front, P255/35R18 rear, summer-only, run flat

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 combination my change the vehicle’s performance characteristics. For more important tire and wheel information, go to cadillac.com/owners/accessories.html or see your dealer.