GM Part Number on my spare is 25537476
From Kirbans in the GM bag a few years ago.
Hopefully they didn't change the # or delete the factory part.
Yes there is a clip that holds it on down at the pan, otherwise the shifting and flexing force wiggles it out of the holder.
It's not all that easy to remember exactly how it goes in there so check out a car with one on it when reinstalling it.