Ah, very smart. Please ignore my ignorance as I was reeling from the $450 price to fix and 4 servers that took a dump that needed to be fixed ASAP. When will my boss realize that my car means more than these computers.
Doing a little searching I've located the following from AC-Delco:
New OE Mass Air Flow Sensors
ACDelco is pleased to announce the addition of five new Mass Air Flow (MAF) sensors to the Emissions Line (Line 21). ACDelco customers will now have a choice of selling new or remanufactured MAF sensors for several popular GM vehicle applications. The reman option still remains the most economical choice for the consumer, but now ACDelco will give our customers the choice to offer a new part for each of these applications.
Reman MAF New MAF FY - LY Application
GM # ACDelco # GM # ACDelco #
19112543 213-3428 19179715 213-4337 1999 - 2005 GM L36 & L67
19112538 213-3423 19179716 213-4338 1996 - 1998 GM L36 & L67
19112549 213-3434 19179712 213-4339 1988 - 1993 GM LG7 & LN3
19112618 213-3503 19179717 213-4340 1996 - 1999 GM L47
19112534 213-3419 19179713 213-4342 1990 - 1993 GM L27
OK, that table may not display well, but it'* reman MAF numbers (GM and AC), then New MAF (GM and AC) then first and last year used, then application.
So the one above in bold is the correct one. Rock Auto carries both the reman and the new.
I will eventually get this info into the other post as soon as I get a handle on my time here.