From Chevy Down Under:

Late 1947 - In mid 1947, GM introduced this new design truck. Gas tank is mounted under the bed & fills through the hole in passenger bedside. Bed contains 9 boards. Truck name stamped in tailgate. Bed approximately 3" wider than prior style. Wiper motor mounts under the dash. Three-speed transmission uses floor shift. Windshield is 2 piece, non-movable type. Windlace around door opening is held in place with screw-on metal retainer. Headliner center bow is screwed to roof of cab. One piece door glass, not vent windows in door. Hood side emblem says CHEVROLET & THRIFTMASTER. Shock absorbers are lever-action type. Serial #'s, EP 1/2 ton, ER 3/4 ton, ES 1 ton, etc...

Check out this page on Stovebolt.

From your description, sounds like he's got an early '47. Check out the Stovebolt galleries. Compare members' trucks, particular '47 first series with '47 seconds.

Bill

Last edited by TxLaTx; 10/27/2011 2:15 AM.