General Motors will equip all of its 2027 model-year electric vehicles with the North American Charging Standard (NACS) fast-charging port, also known as SAE J3400. As a result, owners of Chevrolet, Cadillac, and GMC vehicles will be able to connect their vehicles directly to compatible Tesla Superchargers, as well as other chargers using the NACS standard, without needing a DC adapter.
This transition represents a change in the standard charging equipment for GM vehicles, but it does not mean that all of the company’s current electric vehicles have received the new port. The 2026 Cadillac Optiq has already begun using NACS, and the reintroduced Chevrolet Bolt arriving in 2026 as a 2027 model-year vehicle will also come with a native NACS port.
2027 Models Equipped with the NACS Port
According to the information provided, the NACS port will be standard in all electric vehicles that GM sells or has confirmed for the 2027 model year, including:
- Cadillac Escalade IQ and Cadillac Escalade IQL.
- Cadillac Lyriq, Cadillac Optiq, and Cadillac Vistiq.
- Chevrolet Bolt EV, Chevrolet Blazer EV, and Chevrolet Equinox EV.
- Chevrolet Silverado EV.
- GMC Hummer EV Pickup and GMC Hummer EV SUV.
- GMC Sierra EV.
2026 Vehicles Still Require an Adapter
With the exception of the Optiq, GM’s 2026 model-year electric vehicles come with a CCS1 port, so their owners need the company’s NACS DC adapter to use compatible Tesla Superchargers and other NACS fast chargers. The list includes the Blazer EV, Equinox EV, Silverado EV, Lyriq, Vistiq, Escalade IQ, Escalade IQL, and Sierra EV, along with both Hummer EV variants.
GM sells the approved NACS DC adapter for $275. The adapter works with compatible NACS fast chargers, including more than 27,500 Tesla Superchargers, although some Supercharger locations remain dedicated exclusively to Tesla vehicles.
By contrast, owners of 2027 model-year GM vehicles will need a different adapter when using CCS1-based DC chargers. They will also need a J1772 adapter to use most current Level 2 chargers, including many home charging units. GM sells a CCS1 DC adapter for $189 and a J1772 adapter for $67, or a bundle combining both for $256.
One App for Multiple Charging Networks
GM is also working to simplify the management of charging accounts and payments through the Energy Pass service integrated into the MyChevrolet, MyCadillac, and MyGMC apps. The service currently supports the Tesla Supercharger, IONNA, Electrify America, and ChargePoint networks, while EVgo will be added later. According to GM, these networks collectively cover nearly 70% of fast DC chargers in the United States.
Energy Pass supports the Plug & Charge feature at compatible stations, allowing the vehicle to handle authentication while payment is processed in the background. GM says the feature is currently available at IONNA and is being expanded to other networks, including Tesla Superchargers. Although the transition of 2027 models to NACS will make fast charging easier, keeping both CCS1 and J1772 adapters in the vehicle will remain useful for accessing different types of infrastructure.