Marta Lavandier/AP
- The United Auto Workers went on strike on Friday after the union's four-year contract expired.
- The strike could impact car prices and the US economy.
- The cost of a new car has increased since the pandemic slowed production.
The auto workers strike against Detroit's Big Three auto manufacturers — General Motors, Ford, and Stellantis, which owns Chrysler and Jeep — could hit consumers' wallets if the work stoppage lasts long enough.