02 sensors

[bdw78]

hello all, I am new here.. I am trying to find out if all 4 of my 02 sensors are the same part number on a 2004 Chevy Tahoe z71? I get mixed answers from people.. thank you

 

[wjburken]

hello all, I am new here.. I am trying to find out if all 4 of my 02 sensors are the same part number on a 2004 Chevy Tahoe z71? I get mixed answers from people.. thank you

According to Rock Auto, upstream and down stream are same number