Workers at General Motors plants went on strike Sunday at midnight after talks between the automaker and the United Auto Workers union broke down Sunday morning. The automaker built up inventory in case a contract wasn’t reached, so consumers won’t be immediately impacted. But depending on how long the strike goes on, some models will lessen in supply and not all trim levels and options will be available. In other words, it will become difficult for car buyers to get the exact model they want. Of the GM brands, Chevrolet currently has the smallest supply of vehicles.