I came across a sending unit today while cleaning out some Chevy parts, and I can't the part number in my Chevy books, so I am thinking that it might be Olds or Pontiac, since both of these brands were also sold with Chevy's. I used to buy dealership part obsolescence.. the part is Group 3.107.. Part #6428630. If someone has the Oldsmobile books and could let me know if this is an Olds part, and what the application in, I would greatly appreciate it. Thanks Junk..