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Which O2 sensor?

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

  1. blackburb

    blackburb Member

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

    99'HEARTBEAT Moderator Staff Member Platinum Contributor 1000 Posts

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

    blackburb Member

    Thanks! 10char

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