Can I go to any GM dealer and pick one up or ? Doesn't have to be 100% correct, just one that looks good and works properly! 13LB or 15LB or does it really matter? Thanks!
If you can wait, spend the $30 on the one Brett linked above. You’ll have a functioning, correct looking cap. I keep a couple of generics around too, but the blue stripe cap looks great.
The one in the link is what the cars came with new. The one I have is a replacement. Both would pass muster at any show.