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71CHEVYSHORTBED402

02-10-2025 01:34 PM

Question about OEM wiper arms

1 Attachment(s)

Pretty sure these are OEM. Not sure who made them, perhaps Trico. I'm wondering what the head, or spindle nut for lacking a better term is made and finished???? All I know is the coating is durable. Perhaps anodized?

GM parts were so great right? 140K on these parts, less the rubber.

71CHEVYSHORTBED402

02-10-2025 06:19 PM

Re: Question about OEM wiper arms

I'm not 100% sure it's coated, but if so, it's hard. However the part was made, it's not magnetic, while the stainless arm very much is.

1970cstblazer

02-11-2025 08:13 AM

Re: Question about OEM wiper arms

Those are OEM. Its a die cast zinc metal. I have had the silver coating peel off on a couple of them. I thinks it's a plating, not paint. I have also had the teeth strip. Mine were made by Trico.

71CHEVYSHORTBED402

02-11-2025 12:52 PM

Re: Question about OEM wiper arms

Quote:

Originally Posted by 1970cstblazer (Post 9369004)

Those are OEM. Its a die cast zinc metal. I have had the silver coating peel off on a couple of them. I thinks it's a plating, not paint. I have also had the teeth strip. Mine were made by Trico.

Thank you. I just checked my notes to see these arms are stamped TRICO 3378874

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