the only thing i really know is that a chevy diesel needs a vented cap or it runs like poop i assume (ass_of_u_and_me) that is true of all diesel vehicles

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commercial fisherman diesel in my blood in my boats trucks and Dear old Dad has had me drivin them since i got my first license in 1968
1986 300 SDL 427654
1999 Chevy Crew Cab Dually 225423
1986 300 SDL 287000 Dad's
1987 190 Turbo 158000 Mom's (my inheritance)