OEM 2007 Cadillac Escalade EXT Oxygen Sensor

2007 Cadillac Escalade EXT Parts Questions & Experts Answers

• Q: How to replace the Heated Oxygen Sensor (HO2S) for Bank 1 Sensor 2 in the 1500 Series on 2007 Cadillac Escalade EXT?

  A: Starting the Heated Oxygen Sensor (HO2S) for Bank 1 Sensor 2 replacement in 1500 Series vehicles requires lifting and supporting the vehicle. Use a socket to remove the connector position assurance (CPA) retainer from the sensor while you disconnect the HO2S electrical connector from the engine wiring harness electrical connector . When removing the HO2S take special care to avoid damaging the pigtail and connectors because such damage could reduce sensor performance. The threads of the old sensor need anti-seize compound GM P/N 12377953, or equivalent, as the HO2S threads require this special anti-seize compound made from liquid graphite and glass beads to help future uninstallation. Tighten the installed HO2S to 42 N.m (31 lb ft). Attach the HO2S electrical connector to the engine wiring harness electrical connector then put the CPA retainer in place before lowering the vehicle. Water intrusion must be prevented by maintaining a tight peripheral seal around the vehicle harness connector and avoiding contact cleaners which may harm the sensor pigtail and harness wires.