This 2021 GMC Sierra 1500 Denali delivers the capability and refinement you expect from a premium full-size truck, combining strong performance with thoughtful design and advanced technology.- 3.0L Duramax Turbo Diesel I-6 with 277 hp and 460 lb-ft of torque- Denali Ultimate Package with 22" polished aluminum wheels and sunroof- GMC MultiPro Power Steps for convenient entry and exit- Premium Bose 7-speaker sound system with SiriusXM 360L satellite radio- HD Surround Vision with trailer view camera provisions- Navigation system with GMC Infotainment and Apple CarPlay/Android Auto- Heated and ventilated front seats with 10-way power adjustment and lumbar support- Multicolor 15" head-up display with trip computer and compass- Automatic Emergency Braking with Forward Collision Alert and Lane Keep Assist- Adaptive Cruise Control with Following Distance Indicator- Rear camera mirror and ultrasonic park assist front and rear- Engine block heater and auxiliary transmission oil cooler- GMC Protection Package with all-weather floor liners and splash guards- Spray-on bed liner with Denali logo- ProGrade Trailering System with integrated trailer brake controllerThe Denali trim elevates your truck ownership with genuine wood interior accents, leather-appointed seating, and premium appointments throughout the cabin. The heated steering wheel, heated and ventilated seats, and automatic temperature control ensure comfort in any season. Remote vehicle starter and keyless open and start systems add convenience to your daily routine.This Sierra's Hunter Metallic Green exterior makes a distinctive statement on the road, while the Signature Denali grille and chrome wheel-to-wheel assist steps reflect the attention to quality you'll find throughout this truck. The 10-speed automatic transmission paired with 4WD delivers smooth power delivery and responsive handling whether you're towing or tackling varied terrain.Modern connectivity and safety technology keep you informed and protected.