Ok, after working on the Blazer for about 3 hrs last night and then pulling it (towing) to my brother-in-laws garage. We stillcouldn't get it to start, the battery was completely dead, and there was fuel pressure up to the block. So my brother-in-law did some more reading and found this link to what we think is the solution to the whole problem, the Ignition switch. Here is the link: https://blazerforum.com/m_145330/tm.htm

This second link is a link that swartlkk posted on how to fix the problem: https://blazerforum.com/m_142449/tm.htm

I will post once we get the part in and it hopefully starts up. Thanks to everybody for the suggestions and direction on what to check.

 

But you're going to have to do that procedure every single time you start it. I need to get off my butt and see if there's a permanent solution somewhere on this board.

 

***Update***
Ok, so we switched out the ignition switch, and it still wouldn't do anything. So we checked all the connections, my brother-in-law cleaned out the lock cylinder, and still nothing. I borrowed a scan tool, and my brother-in-law tried to clear the security light, and nothing. So tomorrow, calling up a tow company and getting it towed to a shop. I've heard that they think the computer is locked up, and you need a Tech II or equivalent, to get it going right. Will post what the shop says is wrong, once i get it back. Thanks again to everybody who tried to help me out.

 

*THE SOLUTION*

Ok I just got my Blazer from the shop, and $345 later, it turns out it was 2 wires. One was in the wiring harness going to the BCM, and the other was coming from the BCM to the ignition switch.

Thanks againfor everybody's advice.