Question about 2002 GMC Envoy

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Change sparkplugs how do I change spark plugs on a 2004 GMC Envoy

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  • Donna Fox
    Donna Fox Oct 07, 2008

    Location of spark plugs in 2002 GMC Envoy SLT

  • Anonymous Apr 09, 2009

    does anyone has a diagram?

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Posted on Oct 04, 2008

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Where are my spark plugs located in my 02 Gmc envoy?


Attached is a diagram of where the plugs and coilpacks are located, you need to remove the air intake resonator box to access this area. Plugs should be changed around 100K miles. Use only AC Delco 41-103 Iridium plugs. #1 is the coilpack and #5 is the spark plug



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Oct 15, 2012 | 2004 GMC Envoy

1 Answer

I cant find the spark plugs on my 2004 gmc envoy


Assuming you are talking about the 6 cylinder engine, the spark plugs are under a cover on top of the engine. There is a coil pack on top of each spark plug, the plugs are recessed in the valve cover.

Oct 17, 2010 | 2004 GMC Envoy

1 Answer

How do I change the spark plugs in a GMC Envoy 2002


Location of spark plugsThey are located along the top of the motor under coil packs that fire the plugs. You have to remove the resonator box from the top of the motor to gain access.
Each coil pack is secured with two long skinny bolts and must be removed carefully. Then simply lift it off and remove the plug directly underneath it.
Use only AC Delco iridium plugs. 100k mile intervals.

Nov 19, 2009 | 2004 GMC Envoy

1 Answer

Difficulty in changing spark plugs on 2004 GMC Envoy


I have a 2004 GMC envoy with a V8 and its not to hard the drivers side plugs are not to bad to get to but the passanger side is a little tricky you have to go through the wheele well to get at them also the spark plug boot are really on there tight and were hard to remove them

Nov 08, 2009 | 2004 GMC Envoy

1 Answer

CHANGE SPARK PLUGS 2004 GMC ENVOY


Well first you will want to get the right size spark plug socket , the rigt sized one for your envoy and then next you will want to remove one spark plug wire at a time so you do not cross any of the wires or if you do you will mess up the timing for the envoy now how to remove a spark plug wire, look first at the plug wire and then gentky twist the wire on the end that goes over the spark plug and carefuly pull back but do not break the wire, next with an extention and the socket put the socket over the spark plug and turn the plug counter clock wise until you have removed the plug and then put the new spark plug in and place the spark plug wire back on the spark plug and just repeat the prosses on the rest,agin do them one at a time that is how I change spark plugs and wires and i have been doing it for years.

Sep 15, 2009 | 2004 GMC Envoy

1 Answer

How to change the spark plugs from a 05 gmc envoy V8


Why? My 2001 GMC has never been changed. The mechanic of our service fleet says it doesn't. I trust a man with decades of experience.

Jul 08, 2009 | 2004 GMC Envoy

1 Answer

2004 Envoy: Plug boots not seating properly


I WOTLD PULL THE SPARK PLUGS AND RECHECK THEM.I HAVE INSTALLED PLUGS AND CRACKED THEM OR BENT THE SPARK PLUG END CLOSED.LOOK FOR BLACK CARBON TRACS ON THE PORCELIN OF THE PLUG OR TORN BOOTS

May 13, 2009 | 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

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