It's a sales pitch for GM dealers.

Looked at a new car lately or signed up for email notification, thats your culprit. GM call back.

I also received a call from this number.  I decided to call and it turned out to be a GM advertising/sales line.  I believe they got my number from either Edmunds or Vehix while I was researching/pricing vehicles.  I won't make that mistake again.

It is GM.  They called me too.

i too keep getting this call. i haven't answered as i don't know for sure who it is. if eric is right and it is a sales pitch for GM dealers or from GM dealers? will they sooner or later give up, i wonder.