The term New Design was supposedly not officially a series name used by GMC. This topic was recently discussed on the oldGMCtrucks.com discussion board.

Advance-Design was an officially used term by Chevrolet for 47-55st trucks.

I think that GMC just used series numbers for their light duty, medium duty, and heavy duty trucks.

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.