The 2021 GMC Sierra 1500 AT4 is equipped with check rear seat reminder, rearview camera system, front side airbags, rear side curtain airbags, front side curtain airbags, 4-wheel abs, anti-lockout power door locks, auto-locking power door locks, programmable safety key, hill descent off-road driving assist, trailer stability control, ventilated disc rear brake, alarm anti-theft system, braking assist, hill holder control, ventilated disc front brake, dual front airbags, vehicle immobilizer anti-theft system, power brakes, latch system child seat anchors, electronic brakeforce distribution, stability control, traction control, in dash rearview monitor, occupant sensing passenger airbag deactivation, front seatbelt pretensioners, front emergency locking retractors, roll stability control, front seatbelt warning sensor.