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2021 GMC Sierra 1500 Crew Cab
AT4 Pickup 4D 5 3/4 ft
69,425 miles
Includes:$11,430 in factory upgrades
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Why You’ll Love This Sierra 1500

Slotted between the SLT and Denali trims in the Sierra 1500 lineup, the AT4 equips this Crew Cab for confident everyday use with an off‑road suspension featuring Rancho shocks, HD Surround Vision for clear parking and maneuvering, and the versatile GMC MultiPro Tailgate that streamlines loading and access.

AT4 Premium Package

Originally valued at $3,200, this package includes Ultrasonic Front and Rear Park Assist, Lane Change Alert with Side Blind Zone Alert, a Bose 7-Speaker Sound System, Wireless Charging, and GMC Infotainment System Radio with Navigation.

Technology Package

Originally valued at $2,075, advanced driver assistance features include HD Surround Vision with 2 Trailer View Camera Provisions, a Multicolor 15-inch Diagonal Head-Up Display, Bed View Camera and Rear Camera Mirror.

Driver Alert Package II

Originally valued at $1,095, integrated safety features like Forward Collision Alert, Lane Keep Assist with Lane Departure Warning, Automatic Emergency Braking and Adaptive Cruise Control provide confident driving.

6.2L EcoTec3 V8 engine

Originally valued at $2,495, this 6.2L EcoTec3 V8 engine delivers robust power and performance for demanding tasks.

Power sunroof

Originally valued at $995, the power sunroof opens the cabin to natural light and fresh air, enhancing the driving environment.

20-inch machined aluminum wheels

Originally valued at $800, these 20-inch machined aluminum wheels provide a distinctive appearance and complement the vehicle's stance.

Onyx black paint

Originally valued at $495, the Onyx black paint provides a deep, glossy finish that enhances the vehicle's exterior presence.

Powerful V8 performance

Unleashes 420 HP and 460 lb-ft through its 6.2 Liter EcoTec3 V8 engine with Dynamic Fuel Management, a 10-speed automatic transmission and 4WD for robust capability.

Off-road suspension with Rancho shocks

Features an off-road suspension system with Rancho shocks, providing enhanced damping and control over rugged terrain.

GMC MultiPro tailgate

A versatile tailgate offers six distinct functions, simplifying loading, unloading and accessing the bed.

Adventure-ready engineering

The AT4 trim is engineered for serious off-road capability, integrating specialized hardware and design for challenging terrain.

High definition surround vision

Provides a comprehensive 360-degree view around the vehicle, including provisions for two trailer-view cameras, assisting with parking and maneuvering.

Automatic locking rear differential

Engages automatically to provide maximum traction to both rear wheels when slippage is detected, enhancing off-road capability.

Heated and ventilated front seats

Front bucket seats are heated and ventilated for comfort in various weather conditions.

Bose premium audio system

The Bose premium audio system delivers a rich and immersive experience with a Richbass woofer.

Spray-on bedliner

A durable spray-on bedliner protects the truck bed from scratches and impacts and features an AT4 logo.

Lane change alert with side blind zone alert

Warns of vehicles in your blind zones and approaching rapidly from behind to assist with safer lane changes.

Wireless charging

Allows convenient charging of compatible smartphones without the need for cables.

This content is AI-generated and some details may not be 100% accurate. Refer to the details throughout this page for specific vehicle info.

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