Does anyone know where (assuming one exists) the cruise control module on a 92 4.3L 4WD Blazer is located?" I've burrowed to the firewall and haven't found it yet...Must have one since the parts place sold me one.

 

Well... on my '89 S-10 it's up under the dash, to the left of the steering wheel (as you're sitting in the drivers seat). It sit's in it's own little tray, and just slides out (as soon as you get some wires out of the way.