Review on 🚀 High-Performance Vehicle Bullet Antenna Mast Rocket Car Truck Antenna REPLACEMENT for GM Chevy Chevrolet Silverado 1500 2500 3500 HD Avalanche GMC Sierra 1500 2500 3500 Denali Heavy-Duty Pickup Trucks by Bryan Fisher

Another reviewer said it doesn't fit Silverado 2020 2500. You just have to remove the fairing around the antenna first, then install the new antenna and put it all back together. The hole in the plate is slightly off center so it doesn't seem to fit unless you first remove the plate for installation. Works great on my 2021 Sierra 2500 which fits just like the Silverado.