GM OBD1 codes 81, 82 and 83?

1995 CHEVROLET 1500
390,000 MILES • 5.7L • 2WD • AUTOMATIC
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4LASO4
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What does codes 81, 82 and 83 mean?
Aug 30, 2023 at 8:09 AM
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STRAILER
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Here is a list of GM obd1 codes:

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

81 - Brake input circuit fault
82 - Ignition control (IC) 3X signal error

There is no code 83? Can you please recheck it?
Aug 30, 2023 at 12:30 PM
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4LASO4
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Rechecked still flashing code 83.
What is Ignition control (IC) 3X.
Aug 30, 2023 at 12:49 PM
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STRAILER
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This can be the ignition module, coil or primary pickup coil problem, it just says problem with the ignition system.
Aug 31, 2023 at 10:29 AM
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