You trying to figure something out with your old GMC? Maybe I can help. I have a large library of original GMC Factory Manuals and Data.

I am not too strong on custom or modifications as that is generally not my interest and there are lots of great sites for hop-up and custom. My main interest is in original stock trucks of any year.

I have thousands of pages of factory data to reference so maybe I can help you with answers you can't come up with otherwise.

My files go back as far as 1924 on GMC so there is a lot of information. You can also check out the history section on the GMC website.

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