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 …