Express 4500 V8-6.0L (2010)
1 - X128 (Cutaway)
2 - Heated Oxygen Sensor (HO2S) - Bank 2 Sensor 1 Connector
3 - Heated Oxygen Sensor (HO2S) - Bank 1 Sensor 2 Connector
4 - Heated Oxygen Sensor (HO2S) - Bank 2 Sensor 2 Connector
5 - Heated Oxygen Sensor (HO2S) - Bank 1 Sensor 1 Connector