Condon Auto Sales & Service Share: Automobile Dealers Condon Auto Sales & Service Visit Website 4625 Singing Hills Blvd Sioux City, IA 51106 (712) 274-6622 (800) 593-3686 (712) 274-6785 (fax) Hours: Sales: Mon-Thurs 8AM-8PM, Fri-Sat 8AM-6PM. Parts & Service: Mon-Fri 7:30AM-5:30 PM. Closed Sunday About Map About In 1945, the Condon family opened for business in Sioux City, IA as a full service heavy-duty truck dealership. The Buick and Honda dealership was purchased in 1988 from Art Salsness and Condon Auto S What's Nearby? Distance: 5 10 15 20 25 50 mi.