I have a very nice set of 1999 GMC 3/4 ton center wheel caps which must be installed using the newer type of lug nuts. I know these newer style lug nuts came in both metric and sae standard threads. My question is which year were sae standard. I want to install these caps on my 1973 3/4 ton C-20 but don't want to buy the wrong ones. Any help in this purchase will be greatly appreciated.
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Bill
http://www.thecyberguy.com/73pickup/29yearproject.html
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