I'll add some nuance here and its possibly a separate debate on its significance but according to that data, total firearm deaths surpass vehicle deaths but if you look at the split between homicide suicide its like 60-40 homicide-suicide. We would be talking about motor vehicle deaths a lot differently if half that number were kids stealing their parents keys to run into a wall at 100mph.

Here is another bit from the NEJM using CDC data from 2016: https://www.nejm.org/doi/full/10.1056/NEJMsr1804754

Whats interesting is that the gun deaths were higher in 2016 than they are now (roughly 2900). What this suggests is that firearms becoming the leading cause of deaths is not because of a rise in firearm deaths but because the number of vehicle deaths have been dropping off as well - which should be evident based on how little people drove over the last few years.

Edit: also alarming that the per capita rate is increasing as overall gun deaths are still on the decline. That can't be good (if our youth population is declining that rapidly).