Chevrolet is celebrating an electric milestone as the company has built its first Silverado EV prototype and is putting the truck through its paces at the Milford Proving Ground.

GM CEO Mary Barra tweeted the news earlier today and said she’s “looking forward to seeing your photos of these trucks in the wild when they start testing on Detroit streets next month!”

While real-world testing is just getting underway, this particular prototype appears to be a Silverado EV WT. If that’s the case, it wouldn’t be too surprising as the fleet-focused variant is slated to arrive in the spring of 2023, which is several months before the Silverado EV RST First Edition.

Also Read: 2024 Chevrolet Silverado EV Debuts With 664 HP, 400 Mile Range, And The Avalanche’s Midgate

The WT variant is slated to offer up to 510 hp (375 kW / 517 PS) and 615 lb-ft (834 Nm) of torque as well as a GM-estimated range in excess of 400 miles (644 km). The truck will initially have a towing capacity of 8,000 lbs (3,629 kg), but Chevrolet will eventually offer a max tow package which increases that figure up to 20,000 lbs (9,072 kg).

The RST First Edition will follow in the fall of 2023 with a dual-motor all-wheel drive system producing 664 hp (495 kW / 673 PS) and 780+ lb-ft (1,056+ Nm) of torque. The six-figure pickup will also have 400 miles (644 km) of range as well as a Wide Open Watts mode, which enables the truck to rocket from 0-60 mph (0-96 km/h) in less than 4.5 seconds.

Besides revealing the prototype, GM released some initial details about Silverado EV reservation holders. 95% of survey respondents plan to use the truck as their daily driver, while the “top reason they decided to reserve a Silverado EV is because they wanted an all-electric vehicle that also meets their truck needs such as towing/trailering (87%) and off-roading (72%).”