,...… SO ,... any Duramax people out there experiencing a ''cavitation '' issue with the fuel filter on top of the engine?? … my Kodiak started a few weeks ago with this issue. it would just ''die'' cruising along, with no indication. the error code would be a fuel rail loss of pressure. each time the filter would be half empty, and air bound. prime it up & away I would go. ( but the only way to do that was to remove the filter & fill it up). the issue was getting the filter off, at 210 degrees , tucked under the cab, over the engine, dripping fuel all over, can't get your hands in there, etc. etc. highway traffic ''whizzing'' by …. a real dangerous headache, to say the least. spent the day tearing into the issue today. ( and the hand primer pump wasn't working properly , to make issues worse). so that was my target , starting point. problem is, you have to tear the whole top end apart , to get to it . and changing the filter really sucks on a Kodiak. ( I don't think the pickups are a whole lot nicer). what I found was ''something'' ...fiberish ?? ( looked like something you would pull out of your shower drain),... was stuck in the ''supply''...suction ...check valve . the ''delivery '' ..or outlet....check valve was fine. so upon removing the check valve to clean & flush, the idea of replacing the filter head assy., was reverted. the ''tricky'' maneuver on reinstalling the check valve is, getting the ''return'' spring back over the little ''legs'' or ''knubs'' of the check valve. now that will test your patience , & your eyes. so ,... I did what GM should have done from the ''get go'' ,... remotely mounted the fuel filter , to alleviate all that ,.. without the need of removing the inner fender. and you can get your hand onto the primer pump to operate,.. without burning yourself. ( beacause on a 90 degree day, with a smoldering engine,... you can sit beside the raod for along time , for it to cool down enough to ''handle'',.. or just get run into , or ''over''). and the primer pump now works properly. gotta love this mechanical stuff, ...especially if an ..''ECM'' ..is attached to it..... hope this helps someone out there,...