A chopped, rat-rodded 1950s Ford pickup in spirit, the Slamvan has been kicking around since San Andreas and turned up again in the first GTA 6 trailer. Datamined figures show rear-wheel drive, four gears and a light 1,200 kg body. Expect more attitude than grip; this thing has always been about the look.
No acquisition method is confirmed. Custom classics like this have historically been street finds in older neighborhoods or purchases from in-game sites, so one of those is the likely route. Take that as an educated guess rather than a fact.
It was spotted in Trailer 1, confirming its return for GTA 6.
The community companion for Grand Theft Auto VI. Database, maps, guides and tools for Vice City and the state of Leonida.