Question about Chevrolet 2500

1 Answer

1983 GMC Seirra blowing ignition modules

I have a 1983 GMC Seirra pickup that is blowing the ignition module. I have replaced 5 in the past 6 months. It appears to be blowing the module when the truck is off. I replaced the last one a week ago and started the truck twice immediately after the install. A week later and the truck will not start again. Can you tell me what might be happening with the ignition system? When I installed the module, I made sure the grease was spread evenly accross the back of the module to prevent overheating.

Posted by on

  • Marvin
    Marvin May 11, 2010

    are these AC Delco supplied parts? the aftermarket parts are junk.



1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.

    Vice President:

    An expert whose answer gotĀ voted for 100 times.


    An expert who has posted more than 50 answers, of which 90% or more were rated as helpful.

  • Expert
  • 124 Answers

Another person (mountainman1) had this same problem with the HEI he found it to be a bad ground connection at the coil in the cap. When he would replace the module after replacing the cap it would make a new connection for a couple of days then go out again. I do not know if this is your problem but it sounds the same.

Posted on Dec 27, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

1993 gmc pick up 1500 fuel pump works but nouthing at the injections and no spark at the plugs

Is there a tach place on the distributor cap? If so, use a test light on that terminal, engine cranking, see if the lite pulses? A pink wire should carry voltage to coil or distributor cap. It goes got with the key on? Use a test lite and check for voltage. A couple of possibilities, check the ignition module and pickup coil in distributor. Does the distributor rotor turn when you crank it? With gm bypass ignition, it's the ignition module that controls spark during cranking rpms, not the computer.
There is an oil pressure switch in the fuel pump circuit, so once you crank it enough to bring up oil pressure and that switch closes, the fuel pump will run even w/o a rpm signal, but, for other components, the rpm signal is important.
The ignition module gets signal from pickup coil, engine cranking, then ignition module sends rpm signal to computer on purple wire with white tracer. If no signal, the computer won't ground the fuel injectors, among other issues.

May 13, 2018 | GMC Cars & Trucks

1 Answer

Were is the ignition module located on a 1999 gmc Yukon

Instead of spending money on parts, you should get a book and troubleshoot the circuit. It could be the pickup or the module in the distributor, or other electronic components.

Jan 28, 2014 | 1999 GMC Yukon

1 Answer

1997 gmc seirra 2500 pickup 5.7 engine

don't worry about it, MOVE ON, replace the EGR VALVE, have you replaced both the air & fuel filters ? do it. make sure plug wires donot touch each other !!! do you have an ignition module in your distributor, if so replace it, be sure to apply silicone grease underneath where the module mounts, on distributor base, not the module. helps prevent overheating of module . replace your OXYGEN sensor, do it ! see how all this works, good luck !

Mar 14, 2013 | GMC Sierra Cars & Trucks

1 Answer

Cant get my 1992 GMC to fire

replace the ignition module or pickup coil located under the distributor cap ignition modules work when cold and will stop firing when they are warm when they r going bad

Jan 31, 2013 | 1992 GMC Sierra

1 Answer

Hi I have a 1980 trans am with a 305 hei. The car will only run for 30 seconds and then blows the ignition module I have replaced the distributor and the alternator and it keeps blowing modules I measured...

Sounds like a short to ground in the ignition system, maybe the coil ?
The computer grounds the module by way of the pickup coil in the dist.
If the ignition module in the dist is actually being fried, it could be getting high voltage from the coil.

Jul 14, 2012 | Cars & Trucks

1 Answer

I have a 2000 gmc sierra 4.3L that has had the ignition module fail REPEATEDLY over the last 6 months. Auto shop has replaced it ever time, which gets the truck to run again, but only to have it fail again...

Try using heat sink grease between the metal base of the ignition module and the mounting position, from the sounds of it the circuitry is overheating and failing. I noticed that this particular module is very hot while the truck is running with my own Sierra

Aug 16, 2011 | 1994 GMC Sierra

1 Answer

1983 town car 289 sometimes it starts sometimes not no ignition. replaced ignition module ,throtel position sensor coil dist.cap,and rotor.Thanks


Dec 25, 2010 | 1983 Lincoln Town Car

3 Answers

Symptoms of a bad pick up module on a 1996 GMC K2500 Suburban

What I see the most often is a stalled engine with a loss of spark when driving. Once the engine cools off it will sometimes start and run fine for a short while then do the same thing again. Often, but not always, the pickup up coil or ignition module [both are under the distributor cap] have to heat up quite a bit before they will act up. I replace about 10 ignition modules for every one pickup coil but either one can cause the same identical stalling problem. I keep a few known good modules around as test units so I can just replace a suspected bad module and road test it to see if it works. Another thing that can go wrong in these distributors are the magnets built into the pole piece. A weak or cracked magnet can cause all kinds of odd problems such as stalling when placed in reverse, misfires over 1,000 rpm, etc. Worn bushings in the distributor can also cause problems. As far as a specific test you can do to see which part is failing? I wish there was a relaible one. I've tried using a lab scope and module testers to diganose the culprit but you have to catch the problem as it's happening for those tests to be accurate.

Jun 17, 2010 | 1996 GMC Suburban

4 Answers

I want to replace spark plugs (8) and wires on my '84 GMC pickup

get a 20 dollar haynes or chiltons manuel and find the module and coil. always change the ignition module and coil every 4 no more than -5 years to be safe.

Feb 10, 2010 | GMC Sierra 2500 Cars & Trucks

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

131 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

83644 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22393 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides