Chevy did offer an accessory 6v radio for the 41 and 42-46 trucks. They were installed under the dash to the left of the steering column. 41 had a shiny pot metal face and used tuning knobs...42-46 had a brown bakelite face and had vertical turning thumb-knob controls. They regularly come up on ebay.
Take a look at ebay item#140209954109 ...it's that 3 pole courtesy light switch mentioned above...in my experience these switches are rather fragile, they are difficult to find and no accurate repos are available.

Last edited by steveg; 02/28/2008 4:35 AM.
Steve G.
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1942 Chevrolet 1/2-Ton Pickup Truck