[bobcat]

I have an 03 2500 HD Duramax. It has just developed a starting problem. I can pump up the fuel filter primer and there is a leak from the plastic fitting on the bottom. The truck will then start and run fine. When it sits for any length of time, I have to do this all over.

Do I need a new filter? Is this fitting built into the filter or does it get swapped over each time the filter is changed?

Thanks

 

[Big Angry]

That is most likely the water in fuel sensor, Isn't there a rubber washer that goes on that? Could be as simple as that was forgot to be put back on, or you may need to get a new sensor for the filter. Yes, it gets removed/replaced during every fuel filter change.