The 6volt windshield wiper motor Kevin shows is an extra cost option for 1954-55.1 (1st Series) Chevy trucks from what I can find. It's likely an exact match for the same years/models GMC trucks IMO.
Below is a screenshot from a 1929-57 Chevy Master Parts Book showing GM# 5047765 Motor, windshield wiper electric. 1954-55.1 would have been standard 6 volt trucks.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
