Most popular 1-wire oxygen sensor fits many GM vehicles.
A worn-out oxygen sensor can cause engine performance problems, such as surging and hesitating. Replacing a worn-out oxygen sensor: Improves engine performance
A worn-out oxygen sensor is the number one cause of excessive harmful exhaust emissions. Replacing a worn-out oxygen sensor: Reduces air pollution
WHEN TO REPLACE YOUR OXYGEN SENSOR:
Carbon, soot, harmful gases, anti-freeze, chemicals and thermal and physical shock shorten the life of an oxygen sensor. That's why checking for, and possibly replacing*, a worn-out oxygen sensor is an important part of every routine tune up. *Most oxygen sensors wear out after 30,000 to 50,000 miles in use. Newer heated-type oxygen sensors with 3 or 4 wires wear out after 60,000 to 100,000 miles.