After a wave of rushed buying, driven by looming tariffs, US car sales have started to slow, weighing on carmakers.New car sales fell by 300,000 in June from 15.6 million to 15.3 million, according to data released by Cox Automotive last month.“Now we’ve got sales slowing because [the pre-tariff buying] surge pretty much pulled ahead a lot of people that might have been in the market this year, who wanted to buy before tariffs hit,” Mark Schirmer, director of industry insights at Cox Automotive, told Al Jazeera.This will only get harder for carmakers, dealerships and shoppers down the road.“Price rises together with demand destruction,” Sina Golara, assistant professor of supply chain management at Georgia State’s Robinson College of Business, told Al Jazeera. “If consumers don’t have the resilience to pay for those higher prices, they’ll take a step back.”United States President Donald Trump’s erratic approach to tariffs, putting some in place and then taking them away, has made it difficult for businesses to plan. In April, car companies, including Stellantis, Ford and Volvo, suspended financial guidance as a result of the uncertainty.Last month Volvo also said that tariffs will cost it $1.2bn in the second quarter. Ford then announced it expects a reduced annual profits to $3bn after taking an $800m hit from tariffs in the second quarter. GM announced that it expects a $5bn hit, and Toyot …