GMC C series 2002 Owner's Manual page 248

Fuel Filter (Gasoline Engines)
The steel fuel filter is located on the inside of the left
hand frame rail. See "Maintenance Schedule" in the
Index for recommended service intervals.
If your vehicle is equipped with the optional Davco
-
spin on type filter, it is located in the component box.
Fuel Filter (Diesel Engines)
R
The ACDelco fuel filter is located in the component
box. See "Maintenance Schedule" in the Index for
recommended service intervals.
Primary Fuel Filter and Water
Separator (Option)
It has a clear plastic drain bowl at the bottom.
Check the drain bowl occasionally for any water or
particles. To drain the bowl, shut off the engine.
Then partially open the drain valve at the bottom of
the filter. See "Engine Oil" in the Index for proper
disposal procedures.
If you have a Caterpillar
diesel engine, you may
-
have this spin on filter. It is
located in the component
box on the driver's side of
the vehicle, behind
the fender.
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