Shop LinesToGo for your 2003 Yukon fuel lines. Our FL149-DX4B set of fuel lines are ideal for any C/K1500 models with a 5.3L (L59) engine and flex fuel only

Nylon Line Attached to Vapor Line: There is a small section of nylon line included which is attached to the vapor line. It is only a section of nylon that will splice to the original nylon line on the vehicle.

Nylon Lines: We do not produce pre-formed nylon lines and they are not included with your fuel lines. However, repair kits are available which will attach to your existing nylon lines providing new connectors for the fuel supply and return lines. The original connections are often seized and damaged during install.

Repair Kit (Connection at Fuel Lines): This is usually required as the original fuel lines are being disconnected from the nylon during install.

3071-01 includes 1 - 3/8” Nylon Line, 1 - 5/16” Nylon Line, 90° quick connectors

6093-01 includes 1 - 3/8” Nylon Line, 1 union, 1 - 90 degree quick connector 3/8" 

Repair Kit (Connection at Sending Unit): This may only be required if you are replacing the sending unit.

3069-01 includes 1 - 3/8” Nylon Line, 1 - 5/16” Nylon Line, 180° quick connectors