Need an ignition interlock device near Modesto? Intoxalock is available at Cad Modesto, Inc., a certified Intoxalock ignition interlock installer. We can install your breathalyzer in cars, trucks, vans and other vehicles.Car Audio Depot in Modesto, CA has been named Dealer of the Year by vendors and peers many times over. They can help with your car audio needs and now can install a certified ignition interlock device from Intoxalock. Car Audio Depot is approved by the State of California.