Question about 2003 Chevrolet Silverado 2500HD

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2003 Chevy Duramax 2500 HD with a vapor lock when temp is moderately hot; will not start without using prime pump on top of fuel filter housing - sometimes with low fuel level will not re-start even with using primer hand-pump !

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Most likly the filter housing needs to be replaced and or the fule lines to and rom the housing. the housing has the plunger on top and the filter screwed under. The plunger goes bad on these and causes air to enter and then become air locked. this is also very comon on the IPR with the fuel filter housing mounted behind cab on frame rail driver side. road sault gets to these and degrades the unit untill it sucks air. On the c 4500 you need to get the oem fuel lines because of the tight space restrictions to route the lines. the OEM lines are molded to make the tight bends required.

Hope this helps... Good luck

Posted on Jun 11, 2011

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Posted on Jan 02, 2017

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