Is this fender original or aftermarket?

[Toad455]

It's really not that big of a deal, but a friend gave me a drivers side fender over 20 years ago and I stored it away. It "appeared" to be an original since I blasted what seemed like the original paint off down to the metal and sprayed it with epoxy. I'm just now getting around to fitting it on and it seems like an aftermarket. The pic on the left is the one in question, the nuts are welded on the inside. The pic on the right is from an NOS pass side fender I just bought, these nuts match the nuts on the original fenders exact. So does anyone know if these nuts can be used to identify original GM fenders? Or do some look like the pic on the left? These holes are on the fenders inner panel. If aftermarket I will keep looking for another original. Thanks.

 

[legopnuematic]

Yes the one on the left is aftermarket.

GM replacement fenders should also have GM stamped on the rear of the fender that faces the door.

 

[legopnuematic]

Stamp for reference

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Also I have this old thread that details some of the differences.

 

[Toad455]

Thanks, I was figuring it was aftermarket. I wish I knew that before I blasted and primed it but oh well. I've heard of the GM stamp but even my originals don't have it unless I'm just not seeing it. We've had the truck since new so I do know they are original. Where do I find the thread you mentioned? Thanks again.

 

[legopnuematic]

My understanding is only the GM replacement fenders have the GM stamp, the original fenders I have had in my hands have not had the stamp.

If you click the blue text in my post above, or there is a link down in my signature that will take you to that thread.