 To get more than just a great deal, get the Luther Advantage. Every pre-owned vehicle comes with a 60-day, 2,500-mile warranty. Every pre-owned vehicle comes with a 5-day, 500-mile return policy. Use your Luther Advantage card and save on gas, or even a car wash at any Holiday Station store. Get the Luther Advantage at Luther Family Buick GMC, corner of I-29 and 32nd Avenue South in Fargo.