I was told at dealer that the fuel acuator is shot because I have sand in my fuel lines. Don't know how it got there, but it would cost $851 to fix. Is the acuator upstream or downstream of the fuel filter? How do you go about clearing the lines? Can I put an in-line filter in to keep from dropping the tank? Any help is appreciated, I need to keep this tight in the wallet this close to X-mas!!!! It's an '06 2500 4x4 auto with the diesel.

 

I am stupid about that sort of thing but it would help if you update your signature with year of truck etc.