$15 On the purchase of 3 ACDelco wiper blade or $5 p/wiper blade. Limit 3 Must present coupon at time of write-up. Excludes tax and shop supplies, if applicable. Prior services excluded. Cannot be combined with any other offer. See dealer details and rebate form. Allow 6 to 8 weeks for delivery of debit card. Cannot be combined with any other offer. See dealer for details.