How do you replace oil pressure switch on 1995 Oldsmobile 98?

To replace the oil pressure switch on a 1995 Oldsmobile 98, first ensure the engine is cool and disconnect the negative battery terminal. Locate the oil pressure switch, typically found on the engine block near the oil filter. Remove the electrical connector and then use a socket to unscrew the old switch. Install the new switch, reconnect the electrical connector, and reattach the battery terminal before starting the engine to check for leaks.