Need a part number search for Group 16.040 part number 3794940, my book only goes to group 15
Windshield gasket trying to confirm what year pickup it fits

A quick internet search says it fit a 64-66 pickup without deluxe trim. As of a few years ago it was still a good part number with GM. You might try your local Chevy dealer. They may be able to help.

Looks like it was miss boxed, it is the style that has the chrome trim in the gasket. What did you use for a search term? I googled the part number and tried gm parts direct with no luck.