New OEM O2 sensors

mijohnst · Feb 22, 2020

I just ordered 2 new upstream sensors for my 2005 Tahoe and noticed after I installed them that the connections weres almost too short. There is literally no play. Has anyone else had that issue?

drakon543 · Feb 23, 2020

yes that's definitely possible especially if you opted for some cheaper aftermarket ones. with aftermarket ones ive had to reroute a bit on different vehicles to get some extra slack. ive also had the opposite and ended up with way too much. oem ones tend to be more vehicle specific where aftermarket ones will group matching o2 sensors with style and plug and give it enough cable so its more universal. nothing wrong with it you might just have to unclip the cable somewhere to give yourself some extra slack.

OR VietVet · Feb 23, 2020

mijohnst said:
I just ordered 2 new upstream sensors for my 2005 Tahoe and noticed after I installed them that the connections weres almost too short. There is literally no play. Has anyone else had that issue?

When you say oem I am assuming that you got AC Delco. Is this the part number for them because these are listed as up stream: https://www.rockauto.com/en/moreinfo.php?pk=438154&cc=1431156&jsn=2249

These are listed as downstream: https://www.rockauto.com/en/moreinfo.php?pk=539430&cc=1431156&jsn=2248

This is a Delphi listed as upstream: https://www.rockauto.com/en/moreinfo.php?pk=1323899&cc=1431156&jsn=2250

This is a Delphi listed as downstream: https://www.rockauto.com/en/moreinfo.php?pk=1323557&cc=1431156&jsn=2253

mijohnst · Feb 23, 2020

Well, I'm a *******. I figured it out. I *thought* I bought new upstream O2 sensors...and so that's where I put the ones I bought. Thank you for posting the links, Ron. I went back and looked and it turns out that I bought 2 downstream sensors and put them in the wrong spots and that's why the wires were too short. Live and learn... thanks again for the help guys!

Wylie_Tahoe · Feb 25, 2020

Bummer! on my 03, all 4 are the same sensor.

OR VietVet · Feb 25, 2020

My 2002 Tahoe is the same, all 4 sensors are the same part #.

mattbta · Feb 26, 2020

PNW VietVet said:
My 2002 Tahoe is the same, all 4 sensors are the same part #.

Yeah, I panicked after I saw your post listing different upstream/downstream as I replaced all 4 of mine (2004 Flex) with a single part number. Went to the delco site and put in 2005 and sure enough they were different. Then put in my model year and listed only the single. Whew.

OR VietVet · Feb 26, 2020

I have not had to replace mine since I have owned it, 4 years, but I have looked ahead just in case. Mike has the 05, so yes, things can change year to year and that is why I BEG all members to put their rig info in their signature. People get in one forum, 2000-2006, and when we look for info that can be different year to year. C'mon man.

mijohnst · Feb 27, 2020

I think that they're all the same except with the OEM the upstream has a longer wire so it can reach the connector. I bet GM saved hundreds and hundreds of dollars by using less wire on those downstream O2 units.

OR VietVet · Feb 27, 2020

mijohnst said:
I think that they're all the same except with the OEM the upstream has a longer wire so it can reach the connector. I bet GM saved hundreds and hundreds of dollars by using less wire on those downstream O2 units.

You can bet they did. Years ago, when the feds got on car manufacturers about meeting fuel mileage, that was when brake drums and rotors got thinner-to save weight, more plastic was used, the vehicles became more aerodynamic.......you get the jist. The same goes for saving money on each little thing to drive profits up.

New OEM O2 sensors

mijohnst

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drakon543

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OR VietVet

Multnomah Falls

mijohnst

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Wylie_Tahoe

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OR VietVet

Multnomah Falls

mattbta

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OR VietVet

Multnomah Falls

mijohnst

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OR VietVet

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