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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.

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  • Marvin
    Marvin May 11, 2010

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

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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

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