[Terrysch]

Thanks for the last pictures. Appeciated.

Absolutely believe that these are original GM tow hooks, which are all forged.

But I am going to pass because I want the part numbers to be clearer on the hooks. Especially with the high cost of the original tow hooks.

Thanks to the other forum members who posted input. Helped me.
I did not know that part number clarity varied so much.
But this is might also be caused by wearing of the forging die. So the letters are not raised as much on the tow hook.

The aftermarket ones I have seen on eBay are castings. Highly recommend against using them because the forgings are significantly stronger.
Realize the cast ones may be purchased for show, appearance only.
But over time some subsequent owners may actually use our trucks off road and use these cast tow hooks. This would be a bad deal. GM used forgings for the greater strength. Just like other tow hooks, for example on the big Class 8 trucks.

I am a retired mechanical engineer and worked many years in procurement.
I purchased a lot of different designs of castings and forgings. The separate stamp/mark is not a foundry mark. Foundries only do castings. The mark is a forging companies stamp.
Because the two hooks are so expensive - unobtanium, I have been studying out tow hooks for awhile now. Sorry for the long post.