GM OBD1 codes 81, 82 and 83?

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?

Rechecked still flashing code 83.
What is Ignition control (IC) 3X.

This can be the ignition module, coil or primary pickup coil problem, it just says problem with the ignition system.