GM accessory windshield washers were available for Advance-Design trucks. There were two designs,
pre-1954 (47-53) and
54/55. The earlier style shows up on eBay infrequently.
I have never seen the a complete set of parts for sale for the 54/55 design (but I know people who have put together sets of parts or have some how found full sets from NOS parts vendors/finders).
The 54/55 design has a foot-pedal that actuates the washer spray and also actuates the wipers (via a cable connection to the vacuum motor). No one seems to have information if/how the 54/55 washer actuates the 2-speed 6v electric wiper motor.
