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Which O2 sensor?

Discussion in 'General Chevy & GM Tech Questions' started by blackburb, Sep 8, 2013.

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  1. blackburb

    blackburb Rockstar 100 Posts

    On the 8.1L, bank 2 sensor 1. Upstream correct? Which side?
     
  2. 99'HEARTBEAT

    99'HEARTBEAT Epic Member Staff Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

    Bank 2....is the Passenger-Side, Sensor 1 is Upstream, Pre-Cat.
     
  3. blackburb

    blackburb Rockstar 100 Posts

    Thanks! 10char
     

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