All 2027 Model-Year EVs to Feature Native NACS Ports
General Motors (GM) has officially announced that starting with the 2027 model year, all electric vehicles from its Chevrolet, Cadillac, and GMC brands will come equipped with native North American Charging Standard (NACS) ports, also known as SAE J3400. This transition will allow GM EV owners to plug directly into Tesla Superchargers and other NACS-compatible charging stations without the need for adapters. GM emphasizes that this move will significantly streamline the charging process and enhance the accessibility of charging networks.
GM states that every 2027 model-year EV will include a NACS port, covering all announced models. The 2026 Cadillac Optiq has already adopted the NACS port, while the reborn Chevrolet Bolt, set to launch in late 2026 as a 2027 model, will also feature the same standard. Other 2026 model-year EVs, such as the Blazer EV, Equinox EV, Silverado EV, Lyriq, Vistiq, Escalade IQ, IQL, Sierra EV, and Hummer EV, will still require GM’s official NACS adapters to connect to Tesla Superchargers.
The NACS standard, formally designated as SAE J3400 by SAE International in 2023, aims to unify North America’s electric vehicle charging interfaces. Compatible with Tesla Superchargers, the standard supports DC fast charging at up to 350 kW, substantially reducing charging times. GM’s full adoption of NACS ports marks a critical step toward standardizing North America’s EV charging ecosystem.
Adapter Options and Charging Station Compatibility
Although 2027 model-year GM EVs will feature native NACS ports, owners may still need various adapters to accommodate different charging standards. GM currently offers three official adapters: a NACS DC fast-charging adapter for $275, a CCS1 DC fast-charging adapter for $189, and a J1772 AC charging adapter for $67. The CCS1 and J1772 adapters can also be purchased together for $256. These adapters ensure that owners can continue using existing CCS1 and J1772 charging infrastructure until NACS becomes more widespread.
GM notes that over 27,500 Tesla Superchargers in North America already support the NACS standard, but some Tesla charging stations remain restricted to Tesla vehicles due to hardware limitations. These stations have not been upgraded to the NACS/SAE J3400 standard and only support Tesla’s proprietary protocol. Additionally, Tesla vehicles manufactured in 2021 or earlier cannot use NACS charging stations without a hardware upgrade. This limitation affects some older Tesla owners, who must visit a Tesla service center to enable compatibility.