Rising diesel fuel prices have pushed costs to near record highs, creating a surge in unsold heavy-duty trucks that is straining dealerships across the industry. Analysts warn that the economic pressure is likely to weigh on third-quarter light-vehicle sales, which are projected to dip modestly amid shifting consumer demand. The combination of soaring fuel expenses and a growing inventory backlog is raising concerns about dealer profitability and market stability. Truck buyers may face longer wait times as dealers adjust to the slowdown in sales.


With diesel gasoline nearing $6.51 a gallon on average, swelling heavy-duty truck inventory is rattling dealers. Third-quarter light-vehicle sales are expected to fall slightly, forecasters say.