I can't say for sure about the '49, but on the '51-'55 the door will not latch if you lock it from the inside first. There are two separate locking mechanisms. The inside one locks the latching apparatus and the key one locks the button on the outside handle. They are not made to be used together.


"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.