Read the pevious posts about replacing O2 sensors, decided it'* time to replace mine. Went to GMpartsdirect.com as others have said they bought them there and couldn't find an O2 sensor listed for a Bonneville. What gives?? Did a search for O2 sensor, oxygen sensor and sensor, came up blank for each keyword. What am I doing wrong? Where else can they be bought from?

Should some kind of lube or sealant be put on the threads of the sensor when putting new one in?

Any tricks on getting one out?

I also read of one person resetting the PCM when replacing the sensor. What is that and should it be done and how is it done?

Anything else I should know about when replacing one? Thanks

1.Here'* an Oxygen Application Chart I developed a little while back! http://www.bonnevilleattitude.com/fo...opic.php?t=568
2.All new O2 Sensors should already have "Anti-Seize" compound on their threads.
3.Cut off the old wire & use Penetrating Fluid to soak the threads of the old one first. Then using a wrench or deep socket remove the old sensor. Next, install the new sensor with a wrench or proper O2 Socket only! If you don't you'll damage the wire & will have to start over!
4.PCm doesn't need to be reset really, but you can if you want to by either disconnecting the battery for a while or (depending on year) use a Tech II Scanner to remove the codes.

Thanks for the info on replacing O2 sensor, Deathrat. Appreciate it!

Other posters have said that gmpartsdirect.com is cheaper than getting the sensor from the dealer, so I tried looking for one on their web site. I couldn't even find a listing for an Bonneville O2 sensor on the web site. BTW, mines a '95. I have the number now, just need to find a place to purchase it from. :?

Just thought that it might be interesting for you to see the price of the ACDelco oxygen sensor that GMPartsDirect sells.
http://www.csce.uark.edu/~jgbertr/rb/Parts.htm ( scroll more than a half down)

If you have the 8 digit part number for any GM part, just plug it into the gmpartsdirect website, and you'll find it. Searches aren't very effective. You really need to know the number before going there.

I seriously doubt you'll find an AC Delco O2 anywhere cheaper than gmpartsdirect.

Thanks for that info. I was able to find the part by searching for the part number.

Would I have to go to a dealer to get the GM number for parts I want, or is there a place on the web where I can search for part numbers, anyone know?? Thanks.

Depends on the parts you want. Just post them here, and between Deathrat and I, we'll nail them down for you.

Thanks.