Here is a link to info on a paint option.
https://www.stovebolt.com/ubbthread...truck-dash-paint-source.html#Post1413546If the Chevy big trucks were the same as the 1/2 ton models the brownish color hammer tone paint was used on:
The Valance above the windshield and the wiper motor covers.
All interior molding parts including, windows, those on the inside door frame, except for the dash trim pieces that mount on the dash.
The dash, ash tray, and glove box door.
The headliner trim and retainers and the kick panel retainers.
And the inside door panels and the sheet metal surrounding the rear window.