Question about 1999 GMC Sierra

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I need to know where the ignition module is located on 1999 GMC Sierra with 4.3 engine.

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Next to the throttle body. Let me know if you still can't find it.

Posted on Mar 27, 2011

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1999 gmc sierra ignition module


If coil near plug, the computer controls spark.
How long since a tune-up? Any applicable trouble codes? Are you missing anything besides spark? Engine cranking, you used a gage and you have good fuel pressure? Also, you have fuel injector pulse?
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Depending on the actual trouble code, the problem may be the ignition module inside the distributor or the coil.

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May 08, 2014 | 1999 GMC Sierra 3500

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I replaced the fuel pump relay, noticed that i had a blown fuse marked ecm. repaced that.ran truck for around 20 min.turned off. when i went to start again it wouldnt. looked at that same 20 amp fuse


There are two ECM fuses - marked ecm 1 and ecm B.
ECM B powers the fuel pump and the Veh control module which handles most of the sensors.
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You may need a repair book with diagrams to check all of the circuits for shorts.

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If the crank position sensor fails then you will not get any spark,another componenet is the ICM (ignition control module)

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94 GMC SIERRA, GREAT RUNNING TRUCK, DROVE IT ON A 4 HOUR DRIVE AND LOST THE POWER, AND ENGINE ALL OF A SUDDEN. PULLED OVER AND IT STARTED RIGHT UP..... IGNITION MODULE?


yes the IGNITION MODULE is the first place i would start
should be located just under the distributor cap lick the picture
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Sep 06, 2011 | 1994 GMC Sierra

1 Answer

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It is right beside the coil on top of the engine passenger side. It is a little black box with 4 pin connecter on it. email me russalm900@hotmail.com with your problems. May not be the ign control module i just played with the same truck and it was a different problem. I bought the ign module $180 for no reason. Let me know what ya got... Hope this helps

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1 Answer

Daytime running lights won't come on fuses check out good and relay good for a 2001 gmc sierra slt


there is a module for the daytime running lights... usually located on the passenger side firewall inside the engine compartment.... it likely needs to be replaced. if you cannot locate it let me know i'll find more detailed instructions for you

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2 Answers

1999 tahoe 350 engine 5.7 v8 fuel filter


This deffinently sounds like your ignition module, it is located on the side of the distributor generally hald on by two screws. This is a very common thing with Chevy / GMC. Good luck and remember to rate all the solutions that you get, thanx.

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