Luke,

I believe the film strip you seek is this one 1948 Servicing Truck Cabs (found in the linked thread Peggy mentions above).

The strip starts right off with the topic "Operation of Door Locks".

Yes/No/Maybe so???

Dan


~ Dan
1951 Chevy 3 window 3100
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"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)