2021 GMC Sierra 1500 AT4 Review – Desirable Diesel

Out in the midwest, a bright red 2021 GMC Sierra 1500 AT4 Duramax Turbo-Diesel will turn more heads than a supercar. Welcomed by my new pickup brethren with raised thumbs, nonchalant nods, and turning heads, it was a stark reminder that - for much of the US - the flexibility and styling of a truck still makes them the go-to mode of transport. After living with the Sierra, for the most part I could understand why.