Yeah, The 2 ton trucks have bolt on dust caps, the 1 1/2 ton have press on caps. Also check your ID plate in the driver door jamb. If it's 16000lb. gvw it's 2 ton, 14000lb. 1 1/2 ton, regardless to what the title says.

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