Upstream of the catalytic converter closer to engine, downstream, the sensor after the catalytic converter towards the tail pipe

 

I was figuring that was the case and I assume they do the same thing.
As Donbrew messaged me I will go with the NGK or OEM Brand !
My guess the ones I have are the Standard Brand!
Thanks for the info.

 

GM Genuine, would be my choice.

 

NGK/NTK is the factory that produces AC/D. Standard is a "collision" part. Bosch has a bad reputation.

 

I thought it was Bosch that wasn’t a good choice!

 

I did not know the NGK/NGT made the ACDelco anyway that is what I will have him get ! Again Thanks for the help

 

That is the way I am going just like the AC Delco plugs you guys recommended :)
Thanks for the help

 

Heck if you were closer and the border was opened up, I come change it for you!

 

That would be cool .
The bummer would be no garage to work on it
But I am lucky I have a mechanic who does not hose me lol
Are they ever going to open the border ? I imagine our border towns have to be hurting!

FYI I now have 2 new grandsons. 1 6 weeks old 1 is 1 week old :) Score now is 6 grandson's 1 Granddaughter

 

I work outside on my driveway, most times.
There are signs they might open the border by Christmas, we Canadians can cross into the US , you US folks have been allowed into Canada for about 2 or 3 months .

Congratulations on the grandchildren!