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2021 GMC Sierra 1500 Crew Cab
AT4 Pickup 4D 5 3/4 ft
66,738 miles
Includes:$6,370 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 its adventure-ready engineering, High Definition Surround Vision for clear maneuvering, and the versatile GMC MultiPro Tailgate.

AT4 Premium Package

Originally valued at $3,200, the AT4 Premium Package adds advanced parking and safety alerts, a Bose 7-Speaker Sound System, and Wireless Charging.

Technology Package

Originally valued at $2,075, the Technology Package provides HD Surround Vision with trailer view camera provisions, a 15-inch Head-Up Display, a Bed View Camera, and a Rear Camera Mirror for comprehensive visibility.

Driver Alert Package II

Originally valued at $1,095, the Driver Alert Package II includes Forward Collision Alert, Lane Keep Assist, Front Pedestrian Braking, Automatic Emergency Braking, and Adaptive Cruise Control.

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.

Balanced V8 capability

Provides balanced performance with 355 HP and 383 lb-ft from its 5.3 Liter EcoTec3 V8 engine with Dynamic Fuel Management, a 10-speed automatic transmission and 4WD.

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.

18-inch machined aluminum wheels

Machined aluminum wheels provide a distinctive appearance and contribute to the vehicle's overall aesthetic.

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