1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

New OEM O2 sensors

Discussion in 'Engine & Drivetrain' started by mijohnst, Feb 22, 2020.

  1. mijohnst

    mijohnst Full Access Member

    Posts:
    174
    Likes Received:
    164
    Joined:
    Dec 16, 2019
    Name:
    Mike
    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?
     
    PNW VietVet likes this.
  2. drakon543

    drakon543 Full Access Member

    Posts:
    1,643
    Likes Received:
    723
    Joined:
    Feb 15, 2016
    Name:
    james
    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.
     
    PNW VietVet likes this.
  3. PNW VietVet

    PNW VietVet Full Access Member

    Posts:
    4,151
    Likes Received:
    2,681
    Joined:
    Oct 8, 2014
    Location:
    Oregon
    Name:
    Ron

    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
     
  4. mijohnst

    mijohnst Full Access Member

    Posts:
    174
    Likes Received:
    164
    Joined:
    Dec 16, 2019
    Name:
    Mike
    Well, I'm a jackass. 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!
     
  5. Wylie_Tahoe

    Wylie_Tahoe Full Access Member

    Posts:
    134
    Likes Received:
    115
    Joined:
    Nov 5, 2018
    Name:
    Michael
    Bummer! on my 03, all 4 are the same sensor.
     
    mijohnst likes this.
  6. PNW VietVet

    PNW VietVet Full Access Member

    Posts:
    4,151
    Likes Received:
    2,681
    Joined:
    Oct 8, 2014
    Location:
    Oregon
    Name:
    Ron
    My 2002 Tahoe is the same, all 4 sensors are the same part #.
     
    wjburken and mijohnst like this.
  7. mattbta

    mattbta Full Access Member

    Posts:
    240
    Likes Received:
    153
    Joined:
    Jun 19, 2012
    Name:
    Matt
    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.
     
    wjburken, mijohnst and PNW VietVet like this.
  8. PNW VietVet

    PNW VietVet Full Access Member

    Posts:
    4,151
    Likes Received:
    2,681
    Joined:
    Oct 8, 2014
    Location:
    Oregon
    Name:
    Ron
    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.
     
    wjburken likes this.
  9. mijohnst

    mijohnst Full Access Member

    Posts:
    174
    Likes Received:
    164
    Joined:
    Dec 16, 2019
    Name:
    Mike
    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.
     
    PNW VietVet likes this.
  10. PNW VietVet

    PNW VietVet Full Access Member

    Posts:
    4,151
    Likes Received:
    2,681
    Joined:
    Oct 8, 2014
    Location:
    Oregon
    Name:
    Ron

    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.
     

Share This Page