Sierra 1500 2WD V6-4.3L VIN X (2004)
8. Remove the HO2S connector from the crossmember, if equipped with 4-wheel drive (4WD).
9. Disconnect the CPA retainer.
10. Disconnect the HO2S electrical connector from the harness.
11. Remove the bank 2 HO2S (2).
INSTALLATION PROCEDURE
IMPORTANT: A special anti-seize compound is used on 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 old sensor is to be reinstalled, the threads must
have anti-seize compound applied before the reinstallation.
