1999-2001 Chevrolet Silverado 1500 with 1 Electrical Connector without Evaporative Emissions Control without Robust Fuel System Auxiliary Tank 2002-2003 Chevrolet Silverado 1500 V6 4.3L Gas Engine with 1 Electrical Connector without Evaporative Emissions Control without Robust Fuel System Auxiliary Tank 2002-2003 Chevrolet Silverado 1500 V8 4.8L Gas Engine with 1 Electrical Connector without Evaporative Emissions Control without Robust Fuel System Auxiliary Tank 2002-2003 Chevrolet Silverado 1500 V8 5.