The name 'Black Car' derives from the reference of African Americans seperating into cards, which is basically affiliations to several different street gangs within San Andreas, which have their own politics and rivalries in prison.
Each 'card' has it's own shot caller which dictates to the gangs that's under it, and upon incarceration, members of said street gang typically align with one of those cards.
The incarceration of many prisoners back in the day was a result of several different factors dating back centuries within the united states, from the Jim Crow laws (That has since disappeared in 1965, following the action ending it when Congress overcame the Southern to pass the Civil Right Act of 1964 and the Voting Rights act of 1965.)
To this day, San Andreas holds some of the highest African American incarceration rates in the United States (as of 2024, the percentage is 37%).
HISTORY OF IT'S UPCOMING:
The Black Guerilla Family, or shortened to BGF, was an African American prison / street gang founded in the 1960s by George Jackson, a black Panther member
The gang's goals was to promote more black superiority and have a unity within the American prison system, it didn't start off as a criminal organization at first but became so after growing to be considered one of the most powerful prison gangs in the United States.
Their influence and numbers soon dwindled down though, as by the 90s they were eventually replaced in both prison and outside, they were replaced in prison by individual cards and outside they were replaced by the Crips and the Bloods
CARDS:
In the 1970s after the dwindling influence of the Black Guerilla Family, Crips took over and allied to fight off their main opponent, the Bloods, which was going great until 1979, when a feud between the Eight Trays and the Rollin 60s Neighborhood Crips happened, a fight broke out between both sides which didn't escalate to a gunfight, but the Eight Trays had another plan, a member (who's allegedly hood hopped and was newly recruited) pulled out a firearm and discharged it at the Rollin 60s group, this would strike and kill a Rollin 60s member, Tyrone Hardeman, who would tragically lose his life.
Later on, various members from the Rollin 60s gang drove over to their territory, asking them to give up the shooter, and the suspected shooter, was unknown to the Eight Tray members at the time as he recently hood hopped and was recruited, the Rollin 60s took it as them trying to cover it up and trying to protect him, this resulted in a feud that's going on for 42 years now.
This feud would become a domino effect, when one falls, the rest falls aswell, this caused every Crip gang on the Westside to choose a side, either being the 2x Crips or the 3x Crips, which established multiple crip on crip violence.
Now when a Crip affiliated member goes to prison, they're associated with the card that their gang is under.