Simple yes, the flash (read / write) is through the Diagnostic Connector (ALDL Connector) in the vehicle. Load the .bin file into the software, then flash through the hardware connected to the...

I use the LT1 Tuning Kit (software & hardware) from TunerCats: http://www.tunercat.com/cables/lt1kit.html

$EEHack is a very good LT1 tuning option: http://fbodytech.com/eehack-2/

Moates.net...