From Grand Theft Wiki
HVY is a vehicle manufacturer in Grand Theft Auto IV that specializes in industrial vehicles. The company's name may be an abbreviation of heavy, possibly referring to the type of vehicles it manufactures.
|Vehicle||Style||Based on (GTA IV)||Notes|
|Airtug||Luggage Tractor||Manufacturer indicated via police chatter|
|Biff||Large truck||Kenworth T800|
|Brickade||Armoured truck||TBOGT exclusive, but does not normally spawn. Make determined through police radio chatter.|
|Forklift||Light forklift||Hyster Forklift Truck|
|Skylift||Heavy-lift helicopter||S-64 Skycrane||TBOGT exclusive. Manufacturer indicated via police chatter|