P129D Turn Signal Flasher 6 volt
This P129D flasher is new, NOS, Aluminum can. This flasher has Black lettering on the can as pictured. A GMC brand flasher, round and tall in shape and in mint condition. It is a 3 terminal flasher with the terminals in the normal configuration.
This 6 volt flasher is a heavy duty flasher marketed in this GMC box but other than that I have idea what it fits.
These instructions are always on the box flashers come in
X — Power (hot lead)
L — Load (to switch operating lamps to be flashed)
P — to Pilot indicator lamp (this connection may be omitted. Flasher will operate properly either way)