rear o2 sensor replacement
Thread Starter
Intermediate
Joined: Oct 2004
Posts: 26
Likes: 0
rear o2 sensor replacement
I have a 98 LS1 check engine light came on so took it to a dealer and put it on a diagnostic machine. Results said I needed to replace the rear o2 sensors. Is this a do at home job? If so does anybody have any suggestions to give? Greatly appreciated.. 
Melting Slicks
Joined: Sep 2003
Posts: 2,458
Likes: 105
From: Northville Michigan
On my '02 Z06 is was very easy to remove the rear oxygen sensors. 
A cresent or open-end wrench will break it free, and from there you just unscrew it, after you have unplugged and freed up the wiring.
Good luck.
.
A cresent or open-end wrench will break it free, and from there you just unscrew it, after you have unplugged and freed up the wiring.Good luck.
.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
It is an easy job, hardest part is unplugging the plugs because of their location. Do them one at a time so you don't mix up the cable routes. Also, you will need some O2 sensor safe anti-seize. You can get it at Autozone. My local dealer didn't carry it, and when I asked what they used, they pulled out a can of GM anti-seize that stated in bold letters on the back "Do not use on O2 sensors" 
That is a good reason to change them yourself.
That is a good reason to change them yourself.
