Don't know the GM Part # but the Filling Station has them. Link
Or you could drive out one of the broken ones and take it down to your FLAPS with the length of the intact lug bolt and a lug nut to check the thread diameter and pitch. They should be able to fix you up.


Kevin
1951 Chevy 3100 work truck
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Photos
1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.