How do I adjust a passenger door on a 1949 Chevy 3100?

To adjust the passenger door on a 1949 Chevy 3100, start by checking the door hinges for wear or damage, as these can affect alignment. Loosen the hinge bolts slightly to allow for movement, then close the door to see how it aligns with the body. Adjust it up or down, or in or out as needed, then retighten the bolts. Finally, test the door for proper operation and ensure it seals correctly when closed.