Through my research I’ve run across a few very helpful documents regarding the trailblazer transmission (the 4L60e).  I’ve amassed them here.

Electronic Controls Document:

Details of the internal wiring, pin-outs, and other electronic details. electronic controls

Hydraulic Schematic:

(Left is the key document, right is the actual schematic file) Details of the internal hydraulic routing and their functions. schematic key hydraulic schematic

Transmission Overhaul Detail:

Factory detail of a complete transmission overhaul. overhaul

Conversion to Manual Shift:

An interesting article detailing how to convert an eletronically controlled 4L60e into a manually-shifted transmission. manual shifting