Re: 1989 R3500 wheelbase from the vin ?
I have had build sheets provided to me from the dealership parts dept. I can’t say how far back in years they go, but the last one I received was for a 1994 C1500. Also, I have heard but never tried it, is contacting GM customer service and they are able to send it via .pdf.
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Customization is what you want it to look like -- not what other people think it should look like
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