Chevy & GMC Vans

I have a 2005 Astro AWD. On the three wire plug in for the MAF sensor what are the wires for and which two are the DC volt wires?
Thanks

Not sure what your issue is.Maybe this link will help.

http://www.autozone.com/autozone/repair ... cb2f9c#top

Black= Ground
Pink= 12V In
Yellow = MAF Signal