Are the connections different for front and rear O2 sensor connections?

 

I just remember one is gray and the other is black.

i have an extra set in my garage i will take a pic and post it

 

If I'm buying aftermarket extensions.....will they fit either the front or back?

 

THEY ARE NOT THE SAME 100% ON THAT REARS WILL NOT WORK IN THE FRONT. The extensions are made for the front only. Will not work correct in the rear.

 

different color and different locating pins so they are not interchangeable but I think the wire connections are the same if that makes sense. One nice thing GM does, they try to make the wiring on the cars as simple as they can so you don't plug things into the wrong item.

 

Appreciate the info. However, I'm thinking I may have bought two sets of rear extensions. I couldn't find a listing for front extensions. Ugh

 

check with these guys, they have all kinds of stuff and might be able to set you up with the extensions you need... caspersmfg dot com

 

 

Black is primary

gray secondary

 

Thank you. They look nearly identical.

I believe that Mid America sent me some for a C6.