If you look around the web, or on this site, you might find a PDF called drac2 with calibration info and pictures and even a pinout. There are scanned documents with fingerprint smudges that show...

No?? Can't imagine why not. :innocent2:


I've never had problems swapping them around before. Maybe a blob of solder in the wrong place?

VSSB is a type of DRAC. Original reprogramming docs didn't even say "VSSB". All my data shows the "white box" versions are plug compatible but if you have something different I've got an open mind....

Yes, 7747 applications expect 2k ppm. They were developed when the speedometer cable drove the speed sensor. I can cross check a 7427 wiring diagram against the DRAC outputs to determine speed...

The pin in question was E5. Range switch C. I need a better proofreader. :(


That matches the manual trans wiring diagrams.

Those diagrams also show two signals from the DRAC. One is VSS...

Right. Whoops... this was specifically related to manual trans applications. Previous post edited for clarity. :)

I have checked the pinout on the first page and cross checked factory pinouts from C/K and S/T vehicles using the same PCM family with manual transmissions. I see no park/neutral switch input or...

Very interesting that GM found ASDF to produce cleaner emissions in the S10. In some masks ASDF is a function of IPW to prevent commanded on times less than injector is capable of and is implemented...