Question about 2003 Chevrolet Silverado 2500HD

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Need to replace the knock sensors on a 2004 silerado hd with 6.0 v8, any special tools I need to change them out? I will also replace the manifold gasket a well

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Knock sensors are pretty simple animals and don't require a special socket, to my knowledge, like say O2 sensors. Just get a wrench that fits it to remove or replace the part.

Posted on Dec 30, 2010

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Nope can be done with a regular wrench, good luck

Posted on Dec 30, 2010

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1 Answer

04 Chevy avalanche knock sensors location


Nathan, 2 Knock's are located under intake manifold.
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Mar 06, 2016 | Cars & Trucks

1 Answer

I have a 2002 Nissan Frontier 3.3l v6 I'm about to change my knock sensor but I also need to change the camshaft position sensor but I'm not positive of where it is located it say bank 1??????


I'm willing to bet you have weak upper O2 sensors & there's nothing wrong with your knock sensor. But if you want, the knock sensor is under the lower intake manifold in the back that is located under the upper intake manifold also called the upper plenum. The lower intake manifold is wedged between the 2 heads and is an enormous pain in the azz to get to. You can check the O2 sensors with a scanning tool that will show you the upper sensors in bank 1 & 2 bouncing electrical current from about .5v to 5v several times per second. Anything less show weak sluggish sensors. The resulting lean mixture causes a knock. Change the sensors and the knock goes away and so does the engine light after you reset it. It took me 6 months to find this problem after replacing everything else including the 6mth old O2 sensors fresh from China. Now I have Bosch. PS The lower sensors went 2 weeks later & I was told any more problems it's the fuel regulator. 2001 Frontier 3.3l v6. No problems since, it purrs like a kitten. I'd suggest the Bosch, it's a special design for that 3.3l engine.

Sep 14, 2015 | Nissan Cars & Trucks

1 Answer

My knock sensor on my 2003 cadillac deville is faulted. How hard and what tools and supplies do I need to replace the knock sensor


  1. Remove the intake manifold.
  1. Disconnect the knock sensor electrical connector.
  1. Remove the knock sensor (KS).
Installation Procedure

    602292.png
    .
  1. Install the knock sensor.Tighten
    Tighten the knock sensor to 25 [n-m] (18 lb ft).
  2. Connect the knock sensor electrical connector.
  3. Reinstall the intake manifold.
    this is quite a job and i would not reccomend a novice mechanic to preform this repair book time is about two hours for this repair hope this helps

Oct 20, 2012 | Cadillac DeVille Cars & Trucks

1 Answer

After engine is warm ( V 6 ) sometimes, but not always, hesitates when trying to speed up and sometimes backfires. Dealer replaced coils and plugs but can't find the problem. 2005 lincoln LS


The spark plugs get replaced around 60,000 miles
& the L/S requires a special spark plug,also
premium fuel or it will knock

If you change plugs every 3 years, then that isn't the issue

Did they remove the upper intake manifold to do the right side
spark plugs?

You never have more then 1 bad coil a year, or sometimes
2 ,but never at one time

A dealer can not work on an L/S for some reason
I own a 2004 V8 & have no issues diagnosing these problems

The front 2 O2 Sensors ,the ones in the front of exhaust converter,
get slow & get replaced at 100,000 miles

You clean the MAF Sensor with CRC MAF Cleaner

A back fire could be a lean condition from a vacuum leak
That could be around the engine or in the EVAP System

Hopefully they checked the TPS Sensor

When I refer to check, I don't mean replace,I mean test &
use an oscilloscope to back probe the sensors,not continually
make love to their scan tools,actually get involved & see what
does work & how well,then you will eventually find something
that doesn't.

The EGR Valves fail on ford products quite offten

Need to check/test fuel pressure at rail on engine,even
road test with gauge taped to the windshield & take scan
tool along to collect data.

You got sometimes & when warm,that is what they should
be working off of
You don't go after a problem ,you find out how things are
doing that do work & the drivability issue will surface.

Dealers sometimes never even road test a car or long enough
So there you go,they won't find anything

Keep in touch,I have all the manuals etc if you give me more
symptoms

Jun 22, 2011 | 2005 Lincoln LS

1 Answer

Need to know how to install knock sensors and where they are need diagram. 2005 expedition 5.4 engine


Hello adamjerkins,

It is somewhat complicated to change the knock sensors. There are two of them and they are located under the intake manifold. The intake manifold must be removed. I would recommend tha you replace both while you have the engine apart.

What leads you to believe the knock sensors are bad, I've seen few bad knock sensors? The knock sensor issues more times than not have been caused by other problems.

After you remove the intake manifold disconnect the knock sensor connectors. Remove the bolts and the two knock sensors then replace with new knock sensors tighten the bolts to 15 foot pounds. Reinstall manifold. The total job for an experienced mechanic with tools is about 5 hours. Not a good job for a beginner.


Regards,
netvan

Mar 05, 2011 | 2005 Ford Expedition

2 Answers

How do i change the knock sensor on 2004 gmc yukon and where is it located


The person who stated they are under the intake manifold is a tool! They are located below the exhaust manifold(one on each side) and are quite simple to replace. Be sure not to overtighten them as they can become too sensitive and may cause detonation. Should be about 16 ftlbs but I would check to be sure. They run about 55 dollars each aftermarket and are about 85 from GM depending on where they are purchased from.

Sep 08, 2010 | 2004 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

2 Answers

Have a 2004 Chevy Silverado need some help. Where is the knock sensor located?


There are two knock sensors on your engine, and they are underneath the intake manifold. You will have to remove the intake to get to the sensors.

Nov 10, 2009 | 2004 Chevrolet Silverado 1500 Crew Cab

4 Answers

Where is knock sensor located on 2001 silverado 6000 engine


Under the intake manifold. Make sure you get the harness for the knock sensors. and clean out all of the rust and junk you're going to find donw in the holes before and after you replace the sensors.

Nov 01, 2009 | 2005 Chevrolet Silverado

1 Answer

How to replace knock senor switch on 2002 mazda protege 5



Removal & Installation

  1. Disconnect the negative battery cable.
  2. Remove the intake manifold.
  3. Disconnect the sensor connector.
  4. Remove the sensor from the engine block.
  5. Installation is the reverse of the removal procedure.

    0900c1528019fa95.jpg enlarge_icon.gifenlarge_tooltip.gif Fig. Knock sensor removal and installation-Mazda 3

  1. Disconnect the negative battery cable.
  2. Remove the intake manifold bracket.
  3. Disconnect the sensor connector.
  4. Remove the sensor from the engine block using special tool 49H018001 or equivalent.
  5. Installation is the reverse of the removal procedure.

    0900c1528019fa96.jpg enlarge_icon.gifenlarge_tooltip.gif GL G

May 09, 2009 | 2002 Mazda Protege

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