Hi,
I think your 1973 Gran Coupe has the Light Package, and therefor also L71 Lock Doors Reminder Light. As I am trying to find out what the difference with the 1974 L81 Door-Ajar feature is, could you please try and look by what kind of switch on the door jamb this feature is actuated?
See https://www.forcbodiesonly.com/mopar-forum/threads/sense-and-nonsense-of-fender-tags.46537/page-2#post-721668
I think your 1973 Gran Coupe has the Light Package, and therefor also L71 Lock Doors Reminder Light. As I am trying to find out what the difference with the 1974 L81 Door-Ajar feature is, could you please try and look by what kind of switch on the door jamb this feature is actuated?
See https://www.forcbodiesonly.com/mopar-forum/threads/sense-and-nonsense-of-fender-tags.46537/page-2#post-721668