Hey you guys!!
Thanks for the great help!! I found the socket for the key in
buzzer, and all is fine with that module now!!
No, Did not test the old module, because a previous shop had
removed it & it was gone. I am pretty sure my wife got ripped off by
an unsrupulous shop (before we were married), but she sure does like
that her light buzzer works again!!!
I couldn't have done it without your help!!!

I still have the issue of the 'underdash' floor courtesy lights not
working, but I'm betting that perhaps there is an unplugged plug up
there somewhere, and I will search more this coming weekend.

"Just cause it's an old Blazer, doesn't mean everything shouldn't
work!!"
So, I keep on trying! We really can't afford something newer at
this time, but gosh, her truck is in such good condition overall, that
it would be silly to get something newer!!
Chevy Trucks Rule!!!

Thanks,
Gary