Replace the injector lines on cylinders 4 and 5 of a 2001 to early 2004 LB7 GM Duramax diesel Silverado or Sierra 6.6L V8 truck with these high quality replacement lines. We always recommend to replace damaged or badly corroded injector lines.
Cylinder number 4 is the second cylinder back on the drivers side of the engine.
Cylinder number 5 is the third cylinder back on the passenger side of the engine.
