This 2021 GMC Sierra 1500 AT4 4WD Crew Cab Short Box in Dark Sky Metallic combines robust power with refined comfort and advanced technology. Powered by a 6.2L Ecotec3 V8 engine delivering 420 horsepower with direct injection, variable valve timing, and cylinder deactivation, it offers strong performance while optimizing efficiency. The 4WD system includes a 2-speed transfer case for enhanced off-road capability. Inside, the cabin features perforated leather-appointed front seats with both ventilation and heating for driver and front passenger comfort. Keyless open and start adds convenience, while the remote vehicle starter system allows easy engine activation from a distance. Trailering is supported with an integrated trailer brake controller and an in-vehicle trailering app, tailored for towing needs. Safety is prioritized with StabiliTrak electronic stability control featuring proactive roll avoidance, a brake assist system, immobilizer, and a high-definition rear vision camera equipped with hitch view. The Teen Driver system provides restricted driving alerts for added security. Entertainment includes a primary touchscreen display integrated with the GMC Infotainment System, Bluetooth wireless audio streaming, voice-activated controls, external memory access, and internet radio capability. A 4G LTE Wi-Fi hotspot ensures connectivity on the go. This Sierra 1500 AT4 balances powerful capability with modern amenities for a versatile driving experience.