Not anything that makes me feel it is 100% responsible for the many different things I have going on with my Blazer.... but enough said in this thread that I feel a bulk of my problems would very well be resolved by replacing the Ignition Switch and wiring. I didn't really find anything with the "search" option.... but in the DIY section it talked about how to change out the ignition switch and the thread had a lot of comments on different things that a bad would could do.... many of which are happening to you and I
Here is a thread link "about" the ignition and related issues when it goes bad:
https://blazerforum.com/forum/article-submissions-discussions-47/anatomy-ignition-switch-33465/
And here is the link for the replacement "how to" thread:
https://blazerforum.com/forum/showthread.php?t=29167
and out of a book:
https://blazerforum.com/forum/showthread.php?t=36967
Hope that helps