Get a new one at a salvage yard.
2004 Chevy Cavalier windshield washer fluid reservoir retaining bolts. Remove the windshield washer fluid supply tube. The windshield washer fluid reservoir will come free.
The pump for the rear window is on the side of the reservoir and the pump for the windshield is on the front of the reservoir
reservoir to hold washer fluid
Mounted on the bottom of the washer fluid reservoir.
On ours, it is behind an access panel in front of the RH tire.
It is located on the bottom of the windshield washer reservoir.
The washer fluid for the liftgate is supplied by the reservoir for the windshield ( according to the owners manual )
Remove the 2000 Chevrolet Malibu washer tank supply hose. Remove the windshield washer tank retaining bolts. Reverse the process to install the new windshield washer tank.
If you were in a wreck you could have damaged your washer fluid reservoir or hoses leading to the spray nozzles. Slightly fill your reservoir with water and observe for leaks.
It is underneath the washer reservoir.
It could be the windscreen washer motor
The washer fluid for the rear liftgate is supplied by the same reservoir as the front windshield , located in the engine compartment