The wiper shaft is spined and the wiper arm fits over it. There is a groove below the splines and there is a small clip that projects from the bottom of the wiper arm. That clip projection needs to be pulled aside enough to clear the groove and then the wiper arm is removed by applying an upward force. I use a screwdrive as a lever to supply the force. I think that there is a diagram in the shop manual.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed

My Chevy Master 4 Door is on the Road!