Question: I have a 54 55 1st GMC deluxe cab long bed.(dead ringer for the truck pictured
in the 1950's print ad "5 years ahead" in front of the brick Pearse Floral
building)My late father bought the truck new from a local dealer and I have recently
rescued it from where it was parked outside for appx. 30 years. The truck is basically
complete. My question is in regards to the rear view mirror which is missing. There is a
power wire and a ground wire protruding from the mirror mounting hole.I have not traced
the power wire and do not find it on any wiring diagrams. Does any body have an idea what this
is for ?