If you can take a picture... BillBoost37 is our avid "Know-it-all" and loves a good challenge.

With that being said, it should only be a 2 pin connector for the oil level switch. GM# 12603782 shows to use a GM# 12102747 Mating Connector (AcDelco# PT374) which shows to be a 2 wire. If it is a 3, you have an oddball setup.