The Stovebolt Site Forums The Shop Area The Electrical Bay Hazard lights '55 1st series truck

I don't think there's any such thing as "factory turn signals" for 55.1. Most turn signal kits were aftermarket. You could switch out the switch mechanism on the steering column for one with a hazard switch. Turn signal kits come either in 4 wire (which only have a left and right output wire for specific turn lights) and 7 wire which can use the stop lights on the rear as turn signals.
Check your Private Messages.

[on edit] Apparently there were factory installed turn signals available for 55.1 trucks. My mistake. I still doubt they were available with hazard function. Probably the only way to do that is to use one of the accessory switches.