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.

The WT variant is slated to offer up to 510 hp and 834 Nm of torque as well as a GM-estimated range in excess of 644 km. The truck will initially have a towing capacity of 3,629 kg, but Chevrolet will eventually offer a max tow package which increases that figure up to 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 and 1,056+ Nm of torque. The six-figure pickup will also have 644 km of range as well as a Wide Open Watts mode, which enables the truck to rocket from 0-96 km/h in less than 4.5 seconds.