Question about 2003 GMC Envoy

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Posted by JSENA on


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SOURCE: 2004 kia sedona 6 cly ... how to change the spark plugs anyone???

Hope not too late to help. I have changed all plugs 2 times now myself. Mine is a 6 cylinder. The rear 3 plugs are impossible to remove without unbolting the intake manifold and other contraptions like the throttle/cruise control cable and 4 inch air intake tube. If you have engine work experience, great! If not, color code every disconnect then match up on the reinstall including plug cables.
Here is where you might not know what to do. First, the gasket (Planum) is a reusable metal gasket. Their is no replacement at Kia (crazy but I asked everywhere in NC) so be sure to tighten each bolt on the intake alternating and to speck amount, a 12 foot socket 1/4 inch wrench is plenty of torque so don't overdo it. I believe 15 lbs of torque is correct but verify. If you like taking risks just tighten using your wrist only (not biceps mustle) as tight as you can using wrist only now! [Rent a torque wrench or buy for $10 - $20 if you don't own one].
Since your doing all this work, change all plug wires and only use Platinum or better plugs that last at least 60k miles of use. You wont be able to change back 3 wires later by the way so buy 3 OEM Kia wires (not the kit) to save money if you want. I mixed plugg types and mine ran just fine!!

Plan on 4 meticulous hours your first time. My 2nd time took 1.5 hrs with a short break.

Posted on Apr 02, 2009


kirtec auto

  • 1348 Answers

SOURCE: What is the spark plug gap for the envoy??

they come pre gapped with collars to prevent the electrodes from getting bent .platinum and iridium plugs will have the surface damaged if you were to adjust them with a feeler gauge,like old plugs had to be gapped. ac or ngk plugs come pre gapped in the box.

Posted on Aug 22, 2009



  • 72 Answers


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.

Posted on Sep 15, 2009


  • 96 Answers

SOURCE: 2001 ford crown vic spark plugs with coil over,

you can use a universal joint extension and a wobble drive extension to get to the difficult ones

Posted on Oct 11, 2009


  • 543 Answers

SOURCE: How do you change the spark plugs on a 2004 Yukon

just pull up ,,they are tight but ive never broken one yet,,,,

Posted on Oct 19, 2009

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1 Answer

Changed spark plugs now no spark 2003 envoy

Coil packs was the problem in the first place. When a spark plug misfires, the high voltage goes no where and the coil starts to deteriorate. After prolonged misfire the coil will not make the hi voltage necessary to fire the plug. Replace the coil packs.

Jul 07, 2014 | 2003 GMC Envoy

1 Answer

Were are the spark plugs on 2003 gmc envoy 6 plugs

The spark plugs are located on the top of the engine, you have to remove the airbox to access the coil pack (1) and then the plugs (5) (see picture)


May 29, 2012 | 2003 GMC Envoy

1 Answer

Where are the spark plugs 2007 Envoy

Assuming you have the 6 cylinder 4.2L engine, the plugs are under the large black air box that has VORTEC on it. Each plug has a coil pack mounted above it, these coil packs need to be removed to get access to the plugs.


Sep 15, 2011 | 2007 GMC Envoy Denali

2 Answers

How do i change spark plugs on my envoy?

If you have a 4.2 L engine, Remove the 10mm bolts on the coils, on top of the engine, remove the electrical connector then the coil, your truck has individual coils, spark plugs are in the hole, 5/8 spark plug socket, don't buy cheap spark pluggs for this truck, it will miss fire, I prefer autolites Autolite Xp Iridium/Spark Plug

May 09, 2011 | 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 spark plugs?

If you have the Inline 6 cylinder engine, the plugs are on top of the engine under the airbox (the one that says Vortec 4200). The airbox is held down by several bolts, disconnect the large air inlet hose and small hose on right side. Once airbox is removed, the coil packs can be seen, remove one coil pack at a time by loosening the single bolt (this bolt stays on the pack), carefully pry the coil pack up. The spark plug will be visible in the well. Make sure to clean out the well before loosening spark plug. Make sure to use only AC Delco plugs.

Sep 12, 2010 | 2005 GMC Envoy

2 Answers

My 8 cly code came up. I changed the plu and now it says cly 7 is bad

While engine running, disconnect cylinder 7 injector, if rpm drop injector ok, now check spark at coil, unscrew 8mm bolt form coil pack, lift up on it a little from spark plug, if you hear spark, coil pack good, replace coil pack boot.That works like a spark plug wire.

Jun 30, 2010 | 2001 Ford Expedition

1 Answer

Have a 03 ion went thru high water it died towed home home took out sparck plugs crancked water shot out oiled cly cleaned plugs drying out air filter still wont start any answeres

Drain all the oil and put on new clean, also repl the oil filter.
Your coil pack may also still be wet-- , mark your spark plug wires and the coils and remove them. Make sure the coils are dry the spark pulg wires ends are dry. Also the plug or the main harness to the coil pac may be wet still, pull the plug and dry that, use an old hair drier or just let it sit a day longer.

Jun 23, 2010 | 2003 Saturn ION

1 Answer

What are the electric plugs that plug into the cylinders of the engine

the spark plugs wire the ones who conect the spark plugs ,if you car is a 4 cly you must have 4 wires ,or if is 6 cly then 6 and so on.good luck hope thles will help

Sep 19, 2009 | 1993 Oldsmobile Eighty Eight

4 Answers

I need a diagram of how to put Spark plugs in a 2003 GMC Envoy

4.3L EnginesFiring order: 1-6-5-4-3-2


Good luck (rated this help)

Sep 18, 2009 | 2003 GMC Envoy

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