General Motors Fort Wayne Assembly Global Customer Audit Operator James Anderson maneuvers a sniffer gauge through the grill of the newly-launched 2014 Chevrolet Silverado LD pickup in Fort Wayne, Indiana. This quality test detects any refrigerant leaks in the vehicle's engine compartment. Quality operators also insert the gauge into the truck's interior vent panels to test for escaping vapors. (Photo by John F. Martin for General Motors)