Left side along the frame rail.
on the driver's side, behind the headlight.
Fuel filter may be clogged. Replace the fuel filter.
The answer I'm giving is based on my 1994 GMC Jimmy, which is still the "square" body style. The fuel tank holds 20 gallons as far as I know.
Its on the inside drivers frame rail.
under the truck in front behind a door in the "skidplate" Its marked Oil Filter
Where is the oil filter on a 1999 gmc jimmy
on the drivers side behind the rear quarter panel
Under the truck on the drivers side frame rail.
Yes along the driver side frame rail.
It is located on the inside of the frame under the driver's door
It is in the carburetor where the fuel line goes in.
Your fuel filter could be clogged up or you could need a new fuel pump.