Heated Oxygen Sensor: Removal & Installation (4.2L Engine); Sensor 1 - Chevrolet Trailblazer Service Manual

Heated Oxygen Sensor
Removal & Installation
4.2L Engine

Sensor 1

To Remove:
1. Disconnect the heated oxygen sensor (HO2S) connector.
Heated oxygen sensor (HO2S) 1 removal and installation
2. For 2002 through 2003 model years, use a J 39194-C oxygen sensor wrench to
remove the heated oxygen sensor (HO2S) from the engine.
3. For 2004 through 2007 model years, use a J 39194-B heated oxygen sensor
wrench to remove the heated oxygen sensor (HO2S) from the engine.