FL398-J Installation Instructions Important Product Information How to Install Fuel Lines for: 1998 Chevrolet K Series (4WD) Truck Fuel Lines, 1999 Chevrolet K Series (4WD) Truck Fuel Lines. 1998 GMC K Series (4WD) Truck Fuel Lines, 1999 GMC K Series (4WD) Truck Fuel Lines. Click here for installation video!