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1996 yukon Question: I replaced all 4 O2 sensors on my 1996 GMC 5.7L Yukon. My scan tool shows "Sensors not ready to communicate or available" for #2 & #4 ( downstream. #1 & #3 are fine and reading.

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If your scan tool shows - " READINESS MONITORS ok- You are all set. Just replaced all 4 O2 sensors and CATS on a 1996 Yukon & I have an Autoxray EZ5000 scanner which gave me the same readings but the truck passed emissions here in mass.

Posted on Jun 19, 2009

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How many o2 sensor are on a 2004 gmc yukon


Hi Charles,

GM products have 4 O2 sensors attached along the exhaust pipes coming off the manifold. Bank 1 is aligned to cylinder 1 on the engine which is the driver's side. Sensor 2 is the one after the convertor (Sensor 1 being the one before the convertor). Link attached for more information.

Oxygen Sensor Locations

I have changed out one of mine; quite easy, but you need a sensor wrench which you can find an any automotive store for around $15.

The part is available readily enough - link attached.

Good luck

Feb 07, 2015 | 2004 GMC Yukon

2 Answers

My 94 yukon starts to choke out and backfire when the engine temp reaches normal, what would I need fix?


have the fault codes read and replace the faulty sensors. possible o2 sensors --water temp /air temp sensors.

Mar 28, 2013 | 1994 GMC Yukon

1 Answer

Where is bank one oxygen sensor located at on a 2003 yukon


Need more information but here is where all your O2 sensors are located
Bank 1 Sensor 1 - Driver's side, before catalytic converter Bank 1 Sensor 2 - Driver's side, after catalytic converter
Bank 2 Sensor 1 - Passenger side, before catalytic converter
Bank 2 Sensor 2 - Passenger side, after catalytic converter

Thank you for using fixya and good luck

May 13, 2010 | 2003 GMC Yukon XL

1 Answer

I have a 2002 gmc yukon. When i press my brakes my antilock brakes go off and stopping is tough. what could this be?


you need to connect a diagnosing scan tool and go for a drive. during an ABS event, watch the values of the wheel speed sensors on the scan tool. chances are one will not be accurate, causing the abs to activate. the sensors are integral to the wheel bearings, and are changed as a complete unit. this is a common failure. good luck!

Jan 25, 2010 | 2001 GMC Yukon XL

2 Answers

Looking for all four o2 sensor positon


You should have an O2 sensor on each side of the exhaust down pipe, (diver's and passenger side) have one just before the catalytic converter and one after the catalytic converter. That's all the four O2 sensors the Yukon has.

Oct 31, 2009 | 1999 GMC Yukon

2 Answers

02 sensors not ready


this code means your catalytic converter is below efficiency status .the o2 sensors will not fix this problem ,the ceramic in the converter is broke down ,so the converter it self is the problem.So many people think that it is a bad o2 but it is the converter!

May 14, 2009 | 1996 GMC Yukon

2 Answers

Service Engine Light


have u checked/ replaced your o2 sensors since you have owned the vehicle?

Jul 22, 2008 | 1996 GMC Yukon

1 Answer

No acceleration


You have to replace the oxygen sensors, the engine computer adjusts the fuel/air mixture by reading the sensors...right now your engine is probably running very rich, which wastes a lot of fuel, and can also cause premature oil breakdown. O2 sensors usually require a special wrench to remove, so try a reliable local mechanic...

Jun 07, 2008 | 2003 GMC Yukon

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