2021 GMC Sierra 1500 AT4 Crew Cab Long Box 4WD

This 2021 GMC Sierra 1500 AT4 delivers the capability and comfort you need for both work and weekend adventures. With its commanding presence and proven reliability, this truck stands ready to handle whatever you have in mind.

- EcoTec3 5.3L V8 engine with 10-speed automatic transmission
- 4WD with off-road suspension and hill descent control
- AT4 high clearance step for easier entry and exit
- Spray-on pickup bed liner with AT4 logo
- ProGrade Trailering System with integrated trailer brake controller and hitch guidance
- Premium GMC Infotainment System with Apple CarPlay and Android Auto compatibility
- SiriusXM 360L satellite radio with 6-speaker audio system
- Heated and ventilated front leather seats with 10-way power adjustment
- Heated steering wheel and auto-dimming rear-view mirror
- Remote vehicle starter system and keyless open & start
- Rear underseat storage with lockable lid
- 18-inch machined aluminum wheels with Goodyear Wrangler DuraTrac tires
- Dual-zone automatic climate control with rear window defroster
- Multiple power outlets including 120-volt bed and instrument panel outlets
- Electronic stability control, traction control, and auto-locking rear differential

The AT4 model brings authentic off-road capability with its specialized suspension tuning and premium protective features. The truck's black exterior is perfectly complemented by the body-color surround grille and bumpers, creating a unified, purposeful appearance. Front fog lights and fully automatic headlights enhance visibility in all conditions, while the 170-amp alternator ensures reliable power delivery for your truck's systems and accessories.

Inside, you'll find the thoughtful design that defines the Sierra experience. The crew cab layout provides spacious seating for five adults, with divided rear seats that fold for cargo flexibility. Premium floor liners with removable carpet inserts and the rear underseat storage compartment help keep your belongings organized and protected. The rear seat center armrest and dual USB charging ports add everyday convenience for passengers.

Trailering capability is built into this Sierra's DNA. The ProGrade Trailering System includes an integrated trailer brake controller, hitch guidance with hitch view technology, and an in-vehicle trailering app to keep you informed while towing. Red recovery hooks provide secure attachment points when you need them. Whether you're hauling equipment or a trailer, this truck manages the responsibility with confidence.

The truck's infotainment system keeps you connected on every journey. Apple CarPlay and Android Auto integration allows seamless smartphone operation, while 4G LTE Wi-Fi hotspot capability and OnStar & GMC Connected Services keep you linked to what matters. The 4.2-inch driver information center provides vehicle diagnostics and trip data at a glance.

Safety and control are paramount in this Sierra's engineering. Electronic stability control, traction control, and auto-locking rear differential work together to maintain stability in challenging conditions. The comprehensive airbag system, anti-lock braking, and hill descent control provide multiple layers of protection and confidence.

This 2021 Sierra 1500 AT4 is ready to prove its worth. Come see it in our showroom and experience the capability and refinement that make it a trusted choice for serious truck owners.

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