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Oxygen Sensor Replacement 1988 Chevy G20 Van 5.7 350

I need to replace my O2 sensor on my 1988 Chevy G20 Van 5.7 350 and am not sure where it's located. I have the part and have been told it's not too difficult to install, I just need to know the specifics. If anyone can help with a diagram or advice I'd really appreciate it!

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  • Cars & Trucks Master
  • 5,332 Answers

You'll need to crawl under the van and look at the exhaust pipes before the catalytic converter. You will see it once you take a peek.

Posted on Nov 26, 2012

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Posted on Jan 02, 2017

  • 27 Answers

SOURCE: Oxygen Sensor Location 2001 Ford Expedition Eddie Bauer

There are four o2 sensors on this truck. one on each side just below the exhaust manifold, and one on each side behind the second catalytic converters. (just about even with the back of the front doors.

Posted on Jun 18, 2008

  • 141 Answers

SOURCE: Need to replace the oxygen sensor in my 2003 suburban

Ther are at leat 3 and maybe 4 o-2 sensors in that particular truck...one on each exaust pipe coming down from manifold...and one after convertor on each bank....Pass.side before convertor is bank one,sensor one ..behind convertor is bank one sensor two..drivers side before convertor is bank two,sensor one...behind convertor is bank two sensor two(If equipped with four....scan will tell you which one is bad....good luck..lee

Posted on Mar 28, 2009

co7196
  • 3433 Answers

SOURCE: diagram for 1994 chevy z71 k1500 4x4

o2 sensors are located on the header pipe and on the catalyctic conververter on some vehicles. Spray with wd40 or the like before unscrewing it.

Posted on May 23, 2009

  • 3600 Answers

SOURCE: oxygen sensor replacement

you need to rent an 02 sensor socket and use a ratchet and the socket to remove it, there are two on the exhaust pipe one before the cat, you can see it on the exhaust pipe and one after. normally the 1at one goes out. cost $75.00 please rate if helpful.

Posted on Aug 14, 2009

Testimonial: "it was very helpful! thanks"

emissionwiz
  • 75822 Answers

SOURCE: need to replace knock sensor/ O2 sensor 04 kia rio

IT IS IN THE SIDE OF THE ENGINE BLOCK, SCREWED INTO THE WATER JACKET OF THE BLOCK

Posted on Sep 18, 2009

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Anrez, your 1991 Chevy trucks O2 sensor could be located in the Y pipe just ahead of converter or in the front portion of the converter.
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22 MM wrench or O2 socket and ratchet. And yes, heat helps to get them out. Just a note. Older O2 sensor can strip the threads coming out. they have a rethread tool at the parts store. You will know right off the bat. Most O2 sensors when broke free will unscrew by hand. If you have to wrench it off, the threads stripped.

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How to change upstream o2 sensor on 2008 chevy uplander 3.9l ?


  • 1 Warm up the engine for about four minutes to bring it to operating temperature. Then turn off the engine. This will avoid damage to the exhaust pipe threads if that sensor has seized to the pipe.
  • 2 Find the oxygen sensor or sensors you need to replace. The upstream sensor is located near the exhaust manifold and the downstream sensor on the back exhaust pipe, close to the catalytic converter.
  • 3 Disconnect the oxygen sensor electrical connector. Depending on your particular Chevy model, both sensors may be disconnected from the engine compartment.
  • 4 Lift the front of your Chevy model to reach the sensor you need to change, if necessary. Use a floor jack and two jack stands to support it.
  • 5 Remove the oxygen sensor using a box-end wrench or a ratchet and oxygen-sensor socket.


  • Read more : http://www.ehow.com/how_5159092_replace-oxygen-sensor-chevy.html

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    02 sensor is your oxygen sensor, 98 chevy astro carries 3 oxygen sensor. i belived your bad sensor is on the passenger side by the exhaust manifold but if not try the drivers side all the oxygen sensor for this van are the same. you need to go under the van to replace it, if is to hard to get it out turn your van for five minutes then turn it off and try again, be carefull not to burn your self. the one close to the catalytic converter is the downstream oxygen sensor ok, good luck!!!!!!

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    Replacement of oxygen sensors on a 1997 Mercury Tracer LS. Sell the Tracer and buy a Ford Focus, or 2010 Chevy Cobalt, or a new Chevy Cruze, or a Ford Fiesta. This solution is best if your Tracer has over 130,000 miles on it.

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    What does the oxygen sensors look like in a 2003 Chevy Venture (warner Brothers Edition) ? How many are there? Where are they located? Can you show a picture of them in place? How do i replace them? Chevy...


    There should be an O2 sensor before and after the catalytic converter on your vehicle, so it will have 2 sensors. You'll need a 7/8" open end wrench or an O2 sensor socket to replace them.

    It'll look something like this: http://www.carsteering.com/data/all_images/48-01718.jpg

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