thumbnail|A replica of Toyota G1 in [[Toyota Commemorative Museum of Industry and Technology|Toyota Museum]]
The Toyoda G1 (Toyota G1) was the first truck built by the company that became Toyota. It was long, could carry 1.5 tons, and was loosely based on similar class Ford and GM trucks.
The G1 was succeeded by a line of similar Toyota trucks as technology progressed. The entire series was replaced by the BM truck in 1947. shown to the public in November 1935, (The DA bus should not be confused with the much later DA truck line introduced in the later 1950s.)
Dates and Production Figures
The DA bus was introduced in January 1936 and was discontinued in September 1940.
Mechanicals
Similar to the G1.
GY
A version of the GA with the wheelbase shortened to .
Dates
The GY was introduced in May 1937
Dates and Production Figures
Production was 19,870 units between December 1938 and April 1942.
Mechanicals
Similar to the GA, except for the changes mentioned above.
DB bus
A bus based on the GB chassis, otherwise similar to the previous DA bus. (This DB bus should not be confused with Toyota's much later DB line of diesel buses introduced in the later 1950s.)
Dates and Production Figures
The DB bus was introduced in June 1939
Dates
The HB was introduced in November 1939 The body was still made from steel but was of a simpler design with fewer curves.
Dates and Production Figures
Production was 21,130 units between the KB's introduction in March 1942 and its discontinuation in March 1944.
Mechanicals
Similar to the GB, except for the changes mentioned above.
LB
A version of the KB with the wheelbase shortened to , the same as that of the preceding GB. This shorter chassis was also intended to be used for buses and specialized trucks.
Dates
The LB was introduced in April 1942 Former Toyota trucks had a torque tube driveshaft mount, but this required steel components that were difficult to obtain under wartime conditions, so the KC switched to a Hotchkiss drive. The engine cover was still metal but other body panels were made from plywood. The body design was extremely boxy, with only simple curves used on the engine cover and a flat radiator with no grill. As the war dragged on and material shortages grew worse, more of the body was built from wood, the headlamps were reduced to one, and only rear brakes were used.
One special use for the KC truck was to start aircraft engines on Japanese military airfields, after being equipped with a Hucks starter. A power take-off was taken from after the gearbox. It rose behind the cabin and then projected forward. This was mated to the spinner on an aircraft's propeller to start the aircraft engine. Because this version of the KC wasn't used for heavy cargo, its cargo bed was narrow and the rear wheels were singles instead of the normal doubles. Also, the cabin was very basic, having plywood sides, no doors and a canvas roof. The starter truck was unique in having running boards, due to its narrow cargo bed. Hasegawa made a 1:72 scale plastic model of the KC starter truck labelled as "Starter Truck Toyota GB", even although the real GB had a curved radiator grill and more complex bodywork.
Dates and Production Figures
The KC was introduced in November 1943.