GM has a secret to help sell its new EVs. It's Costco.

In this articleGMCOSTCustomers exit a Costco store in Teterboro, New Jersey, June 28, 2023.Kena Betancur | Corbis News | Getty ImagesDETROIT — General Motors has a not-so-secret weapon when it comes to getting U.S. consumers into its new all-electric vehicles: Costco Wholesale.The Detroit automaker said it's increasingly using the retail giant's Costco Auto Program for EVs as it expands its portfolio from niche vehicles to mass-market segments with vehicles such as the Chevrolet Equinox and Chevrolet Blazer ...