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Old 03-31-2014, 06:44 PM   #1
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2004 national vortec 8.1 fuel filter location

does anyone know where the fuel filter is located n a 2004 8.1 chevy vortec
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Old 03-31-2014, 06:51 PM   #2
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I can't be sure on your National, but on the Gulfstream I had it was on the left frame rail ahead of the tank.
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Old 03-31-2014, 07:34 PM   #3
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Originally Posted by goliath View Post
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.
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Old 04-01-2014, 06:04 AM   #4
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On my 04 W22 chassis it is inside the frame rail just behind the rear axle on the drivers side. My chassis manufacture date is April 2004.
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Old 04-03-2014, 07:30 PM   #5
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Originally Posted by goliath View Post
does anyone know where the fuel filter is located on a 2004 8.1 Chevy Vortec
Left rear in the frame rail, behind the diff.
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cat, fuel, national

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