Series 175 Conv Cab Pontiac 1236 Unit Built In 1965 and 1966 except the 70000 and 80000 Series the serial number arrangement was changed The numeral designat V ing the year was moved from
Chevrolet Heavy Duty Trucky Parts Catalog for y 1966 1972 2 Ton Series 70000 Trucks i 1966 1973 3 Ton Series 80000 Trucks 72 TH 90 1970 1972 3 Ton Series 90000 Trucks