b10,
The 3100 wheels in many Advance-Design years (47-55) were black, except for Suburban Carryall (which had body-colored wheels). Maybe someone has documentation specifically for 1951?
In 54/55, the standard-cab 3100 wheels were black, except for some of the deluxe and/or two-tone exterior options (which might have had body-colored wheels).
GMC wheel colors were often (always?) different from the body color for New Design years (47-55).
