Need an ignition interlock device near Maquoketa? Intoxalock is available at Rotman Motors, a certified Intoxalock ignition interlock installer. We can install your breathalyzer in cars, trucks, vans and other vehicles.Rotman Motors serves as your Jackson County GMC car dealer in Maquoketa, IA. We also are a great choice for buyers coming from Dubuque and Cedar Rapids. Rotman Motors has been an authorized ignition interlock installer for Intoxalock since 1990.