Since 2004, Stonum Automotive has provided motorists in the Longmont, CO area with comprehensive auto repair services. Our goal is to offer the best services available at affordable prices to get you back on the road in no time. Bring Your Car into the Best Repair and Service Center in Longmont We have won several BBB Gold Star Awards and were recently voted the #1 Shop in Longmont by the readers of the Longmont Times-Call newspaper!