Removal Procedure

WARNING: This page is about a different car, the 2002 Cadillac Seville. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the level sensor switch electrical connector.
Using a flat-bladed tool, gently pry upward on the outer edge of the level sensor switch in order to disengage the level sensor switch from the washer solvent container grommet.
Remove the level sensor switch.
Remove the level sensor grommet and discard.

Fig 1: Removing Level Sensor Switch & Electrical Connector
Courtesy of GENERAL MOTORS CORP.