Buy a cheap "for parts" Tech 1 cartridge on eBay, dump its ROM yourself using a PCMCIA reader, then emulate your own legal copy.
Most emulators work via a (like the popular "Red Devil River" or "OBDX Pro GT") combined with a software suite that loads the original GM Tech 1 cartridge ROM dumps. gm tech 1 emulator
Do not short the wrong pins. Getting Pin F (12V constant) to ground will blow a fuse. Buy a cheap "for parts" Tech 1 cartridge
Officially known as the Kent-Moore J 35616-A (or simply "Tech 1"), this brick-shaped scan tool was the dealership-level diagnostic computer for GM vehicles for nearly two decades. It communicated with Engine Control Modules (ECMs), Body Control Modules (BCMs), ABS systems, airbags (SIR), and even early onboard diagnostics via the Assembly Line Diagnostic Link (ALDL) port. Getting Pin F (12V constant) to ground will blow a fuse