Pioneer Bank & Trust, Buffalo, SD Instalment Loans Business Loan Personal Loans Car Title Loans Online Loans Buffalo, SD 102 Main Street. ZIP Code: 57720 (605) 375-3221 South Dakota, Buffalo, Instalment Loans About Pioneer Bank & Trust Opening Hours Monday 8:00 AM – 4:30 PM Tuesday 8:00 AM – 4:30 PM Wednesday 8:00 AM – 4:30 PM Thursday 8:00 AM – 4:30 PM Friday 8:00 AM – 5:00 PM Saturday Closed Sunday Closed Pioneer Bank & Trust on the map Show on Google Map