GREY 02 Oxygen Sensor harness Square 4 Pin LS1 LS2 O2 Wire Harness Gray 24" 2- 24" Grey Square Connector O2 Sensor harness Product details: This listing is for two 24" grey square connector oxygen sensor harness. They will work on many GM application besides those listed. Look carefully at the connector pictures to verify they are what you need, ask if you are unsure. Fitment information: 08-09 G8 GT V8 2004 LS1/LS6 Corvette (front sensors) 04-06 LS1/LS2 GTO (front sensors) 04-05 LS6 CTS-V (front sensors and rear) 05-12 Corvette (rear sensors)