{
  "slug": "gm",
  "name": "GM (Chevrolet, Cadillac, GMC)",
  "nativePort": "nacs-2025",
  "transition": "adapter-then-native",
  "summary": "GM's Ultium EVs launched with CCS1 and gained Supercharger access through a NACS-to-CCS1 adapter in 2024. Newer model-year vehicles are moving to a native NACS port.",
  "adaptersTypicallyNeeded": [
    "nacs-to-ccs1",
    "ccs1-to-nacs",
    "j1772-to-nacs"
  ],
  "ports": [
    {
      "era": "Older models (CCS1 port)",
      "conn": "ccs1"
    },
    {
      "era": "2025+ models (native NACS port)",
      "conn": "nacs"
    }
  ]
}