Oxygen sensors Pre..which one??

[maidi3000]

I found 2 types of upstream oxygen sensors for my 2016 Yukon SLT XL 5.3L
# 12659516
# 12666673
Each one has different size and all online websites saying they fit in my Yukon, the downstream both has the same part number L&R # 12657188
A website says 12659516 for left and 12666673 for right side another website says 12659516 for both sides!!!
Any idea to help me to choose??

 

[Doubeleive]

I found 2 types of upstream oxygen sensors for my 2016 Yukon SLT XL 5.3L
# 12659516
# 12666673
Each one has different size and all online websites saying they fit in my Yukon, the downstream both has the same part number L&R # 12657188
A website says 12659516 for left and 12666673 for right side another website says 12659516 for both sides!!!
Any idea to help me to choose??

best thing to do is a call a gm dealer parts department and give them the last 8 of your vin to get the correct part number and this may mean waiting until tomorrow as I am sure they are all closed today.
but generally speaking the upstream "should" be the same for left & right and downstream "should" be the same for left & right.
but I have not had to change any on the 2015+ yet myself so they could have changed things
you could pull the old ones out to see but that's unnecessary work unless you are in a rush

 

[swathdiver]

Each one has different size and all online websites saying they fit in my Yukon, the downstream both has the same part number L&R # 12657188
A website says 12659516 for left and 12666673 for right side another website says 12659516 for both sides!!!
Any idea to help me to choose??

This is correct according to GMPartsGiant and ACDelco.com

3 different sensors.

https://parts-catalog.acdelco.com/acesCat.php

 

[maidi3000]

Thank you all for replying
Here in my country better to kill them bt not asking for the right part number! G D to them!
I saw in R.A that one of the is shorter than the other...
What about programming??

 

[maidi3000]

Yes it is night now 9:30 pm..I will try to ask the dealer tomorrow morning and hope they will reply me via whatsapp..I used to buy most of online stores..
Thanks again and good night..

 

[Doubeleive]

Thank you all for replying
Here in my country better to kill them bt not asking for the right part number! G D to them!
I saw in R.A that one of the is shorter than the other...
What about programming??

View attachment 445677

View attachment 445678

should not require any programming, with 02 sensors either clearing the code or disconnecting the battery should reset the 02 sensor data and then it has to go thru self-test until they are in a "ready" state.