That is part of the emission system, it filters gasoline vapors through the a charcoal filter before the fumes are sent through the engine.
the fuel filter is running on the under side of the car. follow the fuel lines
under the intake plenum behind and attached to the spider
under the upper intake manifold.
Does 2001 Chevy cavalier have a fuel shut off switch
The fuel pressure relief valve is located Under the Plastic cover on the fuel rail.
In the tank, under bed, left side.
on the pass. side firewall,under the hood, under a black plastic cover.
The fuel pump relay switch and/or reset switch on a 2001 Chevy Tahoe is under the hood junction box. It is found near the center and is marked F/PMP relay.
It is under the upper intake manifold, attached to the bank of poppets.
Under the hood, drivers side, in the fuse/relay center.
Under the rear of the car on the passenger side just in front of the differential.
it is in the fuel tank