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Removal Procedure

Fig 1: Identifying HO2S 2

Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Battery Disconnect Caution in Cautions and Notices.

Disconnect the negative battery cable.
Disconnect the electrical connector.

Fig 2: View Of HO2S

Courtesy of GENERAL MOTORS CORP.

Remove the rear heated oxygen sensor (HO2S2).