^†See an ACDelco Service Center or gmpartsrebates.com for details and rebate form, which must be postmarked by 9/30/18. Retail customers with a U.S. mailing address only. Limit two rebates per mailing address. Allow 6 to 8 weeks for delivery of debit card. Offer ends 8/31/18.

^ΔSee acdelco.com or gmpartsrebates.com for details and rebate form, which must be postmarked by 1/31/19. Retail customers with a U.S. mailing address only. Minimum of four spark plugs required with a maximum of 16. Rebate amount dependent on spark plug type and quantity purchased. Allow 6 to 8 weeks for delivery of check. Offer ends 12/31/18.