Very nice.

F35427Z2010

The information in bold (below) is either information not provided by the "GMC Serial Number Beta" or additional information.

Model = COE (the "F" prefix indicates COE)
Year = 1954/55 (Z=1954/55)
Series = 350
Nominal Rating = 2-ton
Original Motor = 270 (optional 270; 248 was standard)
Wheelbase = 354 = 2-ton with 179" wheelbase
Production = 2010 (should 1000 be subtracted from this number?)

Documentation from Rob English's GMC website.

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.