If that truck is at least a 400 series, there will be a "GMC Parts Identification" plate on the back of the glove box lid, with all the trucks vitals. Engine size, type transmission, type rear axle etc. GMC's were available with live tandems new off the assembly line. Chevy trucks had no assembly line tandems until 1956.


Spanky Hardy
Collector Of Fine Old G.M. COE Trucks & Antique Holmes Wreckers

1948 Chevrolet 5700 COE Holmes HD W35 Wrecker
In the Stovebolt Gallery
More pictures on Photobucket

1950 GMC 250 1-Ton
In the Stovebolt Gallery