Sierra 2500 4WD V8-6.6L DSL Turbo (2007)
4. Disconnect the fuel injection fuel return pipe from the fuel injectors.
5. Disconnect the fuel injection fuel return pipe from the fuel injection fuel feed manifold.
Important: Note the routing of the fuel injection fuel return pipe under/behind the engine wiring harness.
6. Remove the fuel injection fuel return pipe from the engine.
Installation Procedure
