OK, tried to take cheap route and used aftermarket reman MAF....should have known better - and if I would have known about this forum earlier, would have. Question now is do the AC Delco MAF's play welll with us? (01 GTP) I think the OEM one was AC Delco branded but not sure. Dealer wants $391, GM Parts direct is $256 with shipping and Rock Auto has AC Delco for about $175 with shipping. Anyone know if it's compatible and makes PCM smile?