Question about 2004 GMC Envoy

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How to change knock sensor gmc envoy 4.2 2004

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6ya6ya
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Posted on Jan 02, 2017

  • 1608 Answers

SOURCE: where do i find a knock sensor a 1993 gmc sierra

Should be on the right side of the engine by the starter.Has a 1 wire connector.It does not go into the cooling system so you can just take it out without draining the coolant.Hope this helps.Good luck.

Posted on Jan 06, 2010

  • 162 Answers

SOURCE: my GMC Envoy 2004 .... RPM goes over 10 i

probably a problem with TPS sensor ot electronic pedal sensor

Posted on Apr 04, 2010

  • 2 Answers

SOURCE: check engine light....coolant temperature sensor

take altanator off and it is located right behind

Posted on May 25, 2010

  • 1311 Answers

SOURCE: 2004 GMC Envoy with a P0526 sensor problem

This code indicates a problem with the fan clutch, the speed it is running is not the speed it was commanded to run/ The fan clutch assembly needs replacing.

Posted on Sep 09, 2010

Best Try
  • 165 Answers

SOURCE: how to change a fuel level sensor in the gas tank

It is installed in the fuel from the top of the tank so the fuel tank has to come out. You have to disconnect the electal plug, the fuel lines, the filler tube and EVAP hose and unbolt the fuel tank straps. On some vehicals pulling the drive shaft is a must some it just makes it a lot easyer. The sending unit is where the fuel lines and wires go into the tank.

Posted on Oct 19, 2010

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1 Answer

I am a woman learning to fix my 2002 GMC Envoy and it is knocking and the oil disappeared. I had an oil change about 2 months ago.


Could need an engine rebuild you cannot drive without oil and not do damage to the bearings.

Mar 12, 2016 | 2002 GMC Envoy

1 Answer

Changed plugs 04 envoy still hesitant between 20&30mph acceleration after that is slow too. Any answers?????


Wires, distributor, rotor, vacuum leak, O2 sensors, air filter, fuel filter, bad gas. old gas. Throttle positioning sensor, fuel regulator, weak fuel pump, dirty throttle body. Knock out all of the routine maintenance items, check for codes at advanced auto(even if your engine light is not on) and then re-evaluate it from there. And clean your fuel system at your next fill up with a can of B-12 Chem Tool from the additives section at Walmarts auto section.

May 09, 2015 | 2004 GMC Envoy

1 Answer

Number 6 misfire changed plugs coil and injector still misses sometimes


Yes a valve problem could cause the loss in power on one cylinder.
That could show up in a compression test.
You need compression, spark at the right time, and fuel. Replacing the parts does not mean they are working tho.

A knock sensor is a device that measures vibration and sends a signal to the computer to turn back the spark timing to prevent knock. The sensor does not know where the vibration is coming from.

Jan 30, 2013 | 2004 GMC Envoy

1 Answer

My 2003 gmc envoy has p0303 error code. I have since changed the plugs but the code is still there. What else should I look at before changing the expensive coil on cylinder 3?


To find out if it is the coil pack, swap #3 pack with another cylinder and see if the fault changes. If not, you should check the compression on cylinder #3. If that is OK, I would suspect a bad injector.

Dec 28, 2012 | 2003 GMC Envoy

2 Answers

What is a knock sensor


a knock sensor is what the computer uses to detect misfires
in other words the knock sensor tells the computer when u have a misfire and what cylinder is misfiring

Jun 02, 2012 | 2004 GMC Envoy

1 Answer

My GMC Envoy 2004 .... RPM goes over 10 i


probably a problem with TPS sensor ot electronic pedal sensor

Apr 04, 2010 | 2004 GMC Envoy

2 Answers

Engine light/ knocking sensor


The knock sensor is for the timing advance on your envoy. It will not be related to your sparkplugs. Your knock sensor will be screwed into the engine block, or under the intake depending on model. The V8 engine is under the intake.

Apr 30, 2009 | 2004 GMC Envoy

1 Answer

Gmc envoy 2004


sound like poss. speed sensor problem.

Sep 30, 2008 | 2004 GMC Envoy

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