Thanks Jeff, that was the logic in my thinking. If you look at the MAF, the thing has a BIG + and - (plus and minus) sign molded into it! So that made me think both should be at "true" BAT voltage, and why would anything be spliced into a "Labeled Ground" (in series) that would impart impedance? I Know GM does some DUMB S***, but that would take the cake!
Regards,Mike