The Commercial Utility Cargo Vehicle or CUCV Program was instituted to provide the United States military with a utility version of the General Motors Chevy K5 Blazer 2nd edition. The M1009 is a utility rig built from a Blazer and could be used for command and control, as well as simple hack-around duties. It was often seen with radio sets installed, however the large square tube stock mounts prevented the rear seat from being lowered. The M1009 was rated for a 1,200 pound payload and a 3,000 pound towed load. It used the heaviest duty GM springs available for the chassis and the rear axle was a 10-bolt unit.