Cornerstone Bank, G. I. Wal-Mart Diers Branch Basic Info Reviews Routing Numbers Map & Direction Name: Cornerstone Bank, G. I. Wal-Mart Diers Branch Main Office: No Service: Full Service Retail Office Location: 2250 North Diers Avenue Grand Island, Nebraska 68803 Hall County View other branches Phone: 308-398-1222 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer104103421YN104104750YY104113709YN104900349YY104907960YN304987298YN From: To: