Packing List: 1 x Fuel Line 1 x Vent Line 1 x Metal Connector 2 x Plasctic Quick Connector 2 x Plasctic Quick Connector Accessory 4 x Zip Tie Condition: New Compatible with: 2004-2010 Chevrolet Silverado 1500 (4.3L, 4.8L, 5.3L, 6.0L, 8.1L) 2004-2010 Chevrolet Silverado 2500 (4.3L, 4.8L, 5.3L, 6.0L, 8.1L) 2004-2010 Chevrolet Silverado 3500 (4.3L, 4.8L, 5.3L, 6.0L, 8.1L) 2004-2010 GMC Sierra 1500 (4.3L, 4.8L, 5.3L, 6.0L, 8.1L) 2004-2010 GMC Sierra 2500 (4.3L, 4.8L, 5.3L, 6.0L, 8.1L) 2004-2010 GMC Sierra 3500 (4.3L, 4.8L, 5.3L, 6.0L, 8.1L) These Trucks Have No Return Line or Fuel Filter on The Frame Does Not Fit Trucks with: 04-05 Flex Fuel Cab Chassis Precise Fit Part Numbers: FL-FG0340, FG0340, FLFG0340 Function: With the passage of time, the fuel line and vent line will gradually be worn and even rustted. At this time, your vehicle will not be able to be used normally, and will have an impact on safety. It is recommended that you replace the fuel line kit in time. Replacing a new fuel line replacement kit can provide you with long-term stability and excellent performance. Considering the safety of use, it's best to let a professional technician install it if possible.