ABS light/will not shift

Chevrolet G20 Sportvan.
ABS light, will not shift, HVAC no power, windows no power. Replaced VSS, buffer, ABS control module. Finally replaced PCM and light turned off, everything was fine for about 25 miles. ABS light back on and all other symptoms are back. This happened when I lowered driver window. Removed window switch to look for corrosion or short. Now check engine light and ABS and no start.