Guarantee Electrical Company Headquarters3405 Bent Ave.St. Louis, MO 63116Tel: 314-772-5400Fax: 314-772-8824Website: www.geco.com Branch Office21250 E. 31st CircleAurora, CO 80011Tel: 303-373-2400Fax: 303-373-4277 1500 Grand AvenueGranite City, IL 62040Tel: 618-452-6122Fax: 618-452-6973 Represent...