Thank you Kyle, 4x4 problem - FIXED

I have a 2002 Blazer 4x4 with Auto 4X4. I had last used the Auto 4x4 successfully was on December 26 when we experienced icy conditions returning from visiting relatives in Northern California. I tried the 4x4 a few weeks ago and found that it didn't work, just flashing lights in all but 2x4, but the transfer case motor operated and seemed to change the gearing. I searched and found this forum and immediately started educating myself, as the Chilton's Manual I have is only good for a paperweight. Today I have been looking over the 4x4 system on the truck, locating components and etc. as pointed out by Kyle's responses to other member's problems. I finally found the vacuum control valve which is neatly hidden behind the wiring harness and some other connectors. Lo and behold - a vacuum hose right at the valve! I cut the hose, reattached it and now I have a functioning 4x4 system So, this is a huge thank you to Kyle and this forum for telling me what to look for and where to look for it! - Ted