Disconnect the wire terminal from the negative terminal of the battery.
We remove the left front wheel.
Using a 10 mm socket, unscrew the bolt securing the filler neck of the washer reservoir.
We remove the filler neck of the tank.
We take out two pistons and unscrew the four screws securing the mudguard (see Replacing a fog light bulb).
By bending back the front part of the fender liner
disconnect the hose from the washer check valve (the mudguard has been removed for clarity).
By pressing the locking device of the wiring block, we disconnect the block from the washer pump.
Disconnect the hose from the pump fitting.
Using a 10 mm socket, unscrew the nut and bolt securing the tank.
Using a 10 mm socket, unscrew the lower tank mounting bolt.
We remove the tank with the pump.
We remove the washer pump and take out the sealing bushing from the opening of the tank.
We replace a torn or lost elastic bushing with a new one.
We install the washer pump in the reverse order.
(The text of the article was obtained from the website chevyman)