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The AIM may have an assembly line part that does not show in the over-the-counter dealer books.
The dealer books can have multiple part numbers due to slightly different but still serviceable replacements and part number changes over time (supersession).
Are you familiar with the GMparts Wiki site? http://www.gmpartswiki.com/
It's not the most stable of sites, but you can look up a number of parts through all years and models of GM. I usually specify Chevrolet Corvette under the "Any Model" drop down.
The GM wiki also allows you to search by part number to see if other GM lines used the same part which could make searching for it less expensive on places like eBay.
My '72 only uses one horn (hate it compared to the classic GM dual-note horns (A/F?)) but I don't recall the single note (they don't list "moose with a head cold").
Last edited by barkingrats; Aug 1, 2024 at 08:22 PM.
