The engine of the 2021 GMC Sierra 1500 is a 5.3-liter V8. It boasts some of the cutting-edge safety features that Consumer Reports

While forward collision warning is a standard feature on several pickup trucks, it is only an option on the GMC Sierra 1500. 

The absence of any automated highway braking means that the automatic braking system cannot function at high speeds.

The 2021 GMC Sierra 1500 also has optional pedestrian recognition, lane departure warning, lane keeping assist, and blind spot warning.

Backup cameras are standard in all new vehicles, although rear cross traffic alerts are only available on the Sierra 1500.

The 2021 GMC Sierra 1500 is equipped with anti-lock brakes, traction and stability control, and daytime running lights as standard equipment.

The Insurance Institute for Highway Safety rates driver and passenger small overlap crashes as well as front moderate overlap crashes.

Consumer Reports combines these with both their own testing and the IIHS tests. 

Driver performance is good in the front moderate overlap and front small overlap. The front little overlap for the passenger, however, is barely noticeable.

The car has a bad structural and safety cage rating, which is the lowest grade possible. The IIHS roof crush, rear impact, and side crash tests all received favourable evaluations.

The side-crash test rating from the NHTSA is five stars. The same goes for the side-crash testing for drivers and rear passengers.

The GMC Sierra 1500 is safe, then, in 2021. It has average overall crash test ratings.