2015 Chevrolet Silverado 1500 LT LT1 6-Speed Automatic Electronic with Overdrive, 4WD, Black Cloth. EcoTec3 5.3L V8 6-Speed Automatic Electronic with Overdrive Ed Koehn Automotive Group has been serving the greater Grand Rapids area for the better part of 40 years now. Our clients have grown to appreciate the honest, small-town feel of our dealerships. We are here for you before, during and after the sale. Whether you need help with your navigation system, setting up your Apple Carplay or Android Auto or learning how to control everything from the moonroof to the windshield wipers, our team of product experts has you covered! Check us out today to see why our customers come back time and time again for their auto needs. Recent Arrival!