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Where are the spark plugs on my envoy 2003 - 2003 GMC Envoy

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You have a coil on plug design for your engine. The spark plugs are under the individual coils on the top of the valve cover.

Posted on Aug 07, 2009

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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

2003 envoy stalls what is wrong

Bad coil pack possibly, if all spark plugs were replaced.

Mar 25, 2012 | 2002 GMC Envoy

1 Answer

How long should it take a GM service technician to change the spark plugs in aq 2003 GMC Envoy inline 6 cyl?

For a trained technician this job should take from 1 to 1 - 1/2 hours. Some of the plugs are difficult to get to.

Jul 29, 2011 | 2003 GMC Envoy

1 Answer

Wanna do-it-myself tune up on a 2003 GMC Envoy 4.2l. Where are the spark plugs and fuel filter located.

spark plugs are in the top ov the heads somtimes down inside holes so you need a long reach socket the fuel filter will be on the left or right inner wing its a long round black or white tube with an alloy top there will be 2 tubes coming from the alloy top hope this helps m8

Apr 02, 2010 | 2003 GMC Envoy

1 Answer

2003 gmc envoy tune up??looking for the wires??? and lookking for the plugs

The engine has a coil on plug design. You will have to remove the black housing connected to the throttle body, then remove the coils to get the spark plugs out.

Nov 01, 2009 | 2003 GMC Envoy

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

1 Answer

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.

Aug 22, 2009 | 2003 GMC Envoy

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