Originally Posted by goliath
does anyone know where the fuel filter is located n a 2004 8.1 chevy vortec
WELCOME to iRV2 and the Workhorse forum.
ASSUMING yours is a W series chassis, the FF is inside the driver side frame rail, just above and slightly ahead of the rear axle housing. When you find it, look to see if it has 1 inlet and 1 outlet, or
if there are 2 outlets
(facing forward). If yours has two outlets (3 ports), then you MUST buy the adapter so you can use the common 2 port filter such as the AC/Delco GF481, or its current replacement number. The OE 3 port filter is no longer being made, hence the adapter.