A GameSpot report indicates that Grand Theft Auto VI could introduce more intricate methods for stealing cars as part of its emphasis on realism. Players might need to use tools like slim jims or key cloners depending on the car model, with minigames involved for some approaches. This information remains unconfirmed and is based on rumors about the game's development.
Rumored Theft Mechanics
According to GameSpot, older cars might be stolen by smashing windows or using a slim jim that triggers a control-stick minigame followed by hotwiring, while newer vehicles would require a key cloner instead.
Source
GameSpotView Original Article