How many oxygen sensors in a 2002 Cadillac Seville?

A 2002 Cadillac Seville typically has four oxygen sensors: two upstream (pre-catalytic converter) and two downstream (post-catalytic converter). These sensors monitor the oxygen levels in the exhaust gases to help optimize engine performance and emissions. However, it's always a good idea to check the vehicle's service manual or consult a mechanic for confirmation.