July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Glow Plug Control Switch
WARNING: This page is about a different car, the 1997 GMC Forward Control, 1997 Chevrolet Forward Control, and 1997 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Glow Plug Control Switch - 5-Pin Connector, Black