How do you change oil sending unit on 96 Buick Skylark?

To change the oil sending unit on a 1996 Buick Skylark, first ensure the engine is cool and disconnect the negative battery cable. Locate the oil sending unit, typically found near the oil filter on the engine block, and disconnect the electrical connector and oil line. Use a wrench to unscrew the old sending unit, then install the new one by threading it into place and reconnecting the electrical connector and oil line. Finally, reconnect the battery cable and start the engine to check for leaks.