Sierra 3500 4WD V8-6.6L DSL Turbo (2007)
3. Disconnect the fuel injection fuel return pipe from the fuel injectors.
4. Cut the tie strap (1) securing the fuel injection fuel return pipe to the engine wiring harness.
5. Disconnect the fuel injection fuel return pipe from the fuel return pipe.
Important: Note the routing of the fuel injection fuel return pipe under the engine wiring harness.
6. Remove the fuel injection fuel return pipe from the engine.
Installation Procedure
