Question about 2003 GMC Yukon

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2003 GMC Yukon

Where is the Knock Sensor located and how can I replace one.
Thank you
Kim F.

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You will have to remove the intake manifold to gain access to the knock sensors. There are two sensors in the valley under rubber plugs. The sensor in the rear has a tendency to fill up with water and cause trouble. You have to make a dam with RTV to stop the water from getting in there.

Posted on Sep 06, 2008

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2 Answers

TRYING TO FIND MY KNOCK SENSOR IN MY GMC YUKON 2003


Hi, there should be one on each side of the engine in the location shown below. Bank one is the driver's side and bank 2 is the passenger's side. Please let me know if you have more questions, and thanks for using FixYa.

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Apr 27, 2011 | 2003 GMC Yukon

2 Answers

How to repalce a knock sensor on my 2004 gmc yukon


Hi welcom to fixya. A defective knock sensor may cause engine detonation or reduced spark advance and fuel economy. When a knock sensor is removed and replaced, the sensor must be tightened to its specified torque. If the knock sensor is installed tighter than it should be, it may become too sensitive and provide an excessively high voltage signal, resulting in more spark ****** than required. When the knock sensor is installed looser than it should be, the knock sensor signal will be lower than normal, resulting in engine detonation.
To replace the knock sensor:
  • Disconnect the knock sensor wiring connector.
  • Then, unscrew the sensor.
  • Remove the knock sensor.
  • Reverse the procedures to install the part.
  • 15 ft.lbs.torque
  • hope this helps.Thank You for using fixya..iluv2fish.. Ray..

Jul 09, 2010 | 2004 GMC Yukon

1 Answer

I have an engine code PO332 knock sensor 2 circuit low imput bank 2 what is this problem .the car is a 2001 gmc yukon xl .


The most likely cause of your code is a bad rear knock sensor. You should check the knock sensor wiring harness for corrosion. But if that checks out the sensor will have to be replaced. The knock sensor is under the intake manifold, although it's not too difficult to remove. Both knock sensors should be replaced along with the wiring harness, just because of labor involved in gaining access to the sensors. You could try clearing the code, it may stay off for a long time.

May 23, 2010 | 2001 GMC Yukon XL

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

2 Answers

Wanting to know how to change knock sensor on 2001 gmc yukon


Knock sensor is located on side of engine block screwed into a block coolant drain, your best access is from underneath the vehicle. Coolant will run out when you unscrew it so be sure the engine is cool. Just unplug the wire unscrew the sensor, screw in the new one and plug the wire back in. Also be sure to top off the radiator if you loose any coolant.

Mar 11, 2010 | 2001 GMC Yukon XL

2 Answers

Trying to find out where a knock sensor is located on a 2004 gmc yukon


There are 2 knock sensors on some of those, one screws into the block drain near the starter the other near the left exhaust manifold.

Jan 24, 2010 | 2004 GMC Yukon

2 Answers

Locting the throttle position sensor on a 2003 gmc yukon denali


The throttle position sensor is located on the throttle body. Which is in the front of the intake manifold.

Nov 29, 2009 | 2004 GMC Sierra Denali

1 Answer

Where is locate the knock sensor in 2004 yukon xl


There are 2 or them and they are under the intake manifold. The manifold has to be removed to replace them.

Oct 10, 2009 | 2000 GMC Yukon XL

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