Yes the GMC Fleet Option used the Chevrolet TF dash very different than the regular GMC I have a GMC Fleet Option radio,the only one I've ever seen. It is basicly a 55-59 Chevy TF radio with a different part number and a "GMC" on the dial where the Chevrolet botie would have been .
Because of the need for parts to repair these radio I've made a list of passenger car radios that have the same parts, the control shafts on the 55-59 Chevt truck are in the same place as the 55-56 manual tuning Chevy passenger car ,but the dail is different, tuning shaft and volume-on/off control can be used in the truck
The 53-54 Manual tuning passenger car radio control shafts are in the same place as the 54-early 55 Chevy truck and 54-59 GMC, but dail is different, "IF's" "OSC" "ANT" "RF" all the same power transformer from the 55-56 passenger although a different deside can be 12 volt convertion
