Unfortunately, the Silverado EV can’t be flat towed because of its electric motor system. You risk damaging the truck more if you do this.
When you flat tow a vehicle, you need to set it in neutral but electric cars have no gearbox hence no neutral. In addition, when you flat tow the 2023 EV Silverado truck, all four wheels will be spinning, and it may damage the AWD drive system of the vehicle, causing you to incur more repair costs on your EV unit.
Your best bet would be to place the vehicle on a flatbed truck and carry it to a verified Chevy repair shop.