2003 Duramax Fuel Filter Base Leak - duramaxforum wwwmaxforum››01-04.5 LB7 Duramax PowertrainApr 04, 20132003 Duramax Fuel Filter Base Leak. Also, it could be your Fuel Pressure regulator valve being weak, but Like you said. the filter housing is leaking, that's where I would start too. is a lot easier to change than the injector pump and FPRV. BTW, welcome to the forum!Author: Heeb3 I have a 2003 Chevy 2500HD duramax diesel that is having I have a 2003 Chevy 2500HD duramax diesel that is having trouble starting. In the past few weeks it has been cranking longer then normal to start. 3 times including today when I shut it off it would crank but not start and just cranked and cranked. I manually prime the fuel filter that seemd very soft 5 times and tried to crank but no luck.
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