FROM GM SERVICE MANUAL ...........
Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1 or LFW)
Object ID: 2197495Click here for detailed picture of the image.
Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 Callout
Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement.
Heated Oxygen Sensor
Caution: Refer to Heated Oxygen and Oxygen Sensor Caution.
Caution: Refer to Fastener Caution.
1. Disconnect the heated oxygen sensor harness connector.
2. If reinstalling the old sensor, coat the threads with anti-sieze compound. Refer to Adhesives, Fluids, Lubricants, and Sealers.
Tip: A special anti-seize compound is used in the HO2S threads. The compound consists of liquid graphite and glass beads. The graphite tends to burn away, but the glass beads remain, making the sensor easier to remove. New, or service replacement sensors already have the compound applied to the threads. If the sensor is removed from an exhaust component and if for any reason the sensor is to be reinstalled, the threads must have anti-seize compound applied before reinstallation.
42 Y (31 lb in)