2021 GMC Sierra 1500 Crew Cab

AT4 Pickup 4D 5 3/4 ft

85,156 miles

This vehicle is no longer available

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 Value Package

Originally valued at $2,105, this package provides Ultrasonic Front and Rear Park Assist, Lane Change Alert with Side Blind Zone Alert, a Premium Bose 7-Speaker Sound System and GMC Infotainment with Navigation.

Technology Package

Originally valued at $2,075, an 8-inch Driver Information Center, HD Surround Vision, a Multicolor 15-inch Head-Up Display and a Rear Camera Mirror provide critical driving information.

Driver Alert Package II

Originally valued at $1,095, this package offers Forward Collision Alert, Lane Keep Assist with Lane Departure Warning, Automatic Emergency Braking and Adaptive Cruise Control.

AT4 CarbonPro Edition

Originally valued at $1,070, this edition features a CarbonPro composite bed, Black Dual Exhaust Tips, a Black Chrome Grille Surround and a MultiPro Audio System by Kicker.

Duramax 3.0L Turbo-Diesel I6 Engine

Originally valued at $995, this engine provides substantial torque for towing and hauling with improved fuel efficiency.

Power Sunroof

Originally valued at $995, the power sunroof opens the cabin to natural light and fresh air with a simple touch.

Onyx Black

Originally valued at $495, this Onyx Black paint finish provides a deep, glossy exterior appearance.

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.

High-torque diesel power

Delivers substantial 460 lb-ft of torque through a 3.0 Liter turbo diesel 6-cylinder engine, a 10-speed automatic transmission and 4WD, providing strong towing and hauling capability.

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.

18-inch Machined Aluminum Wheels

Machined aluminum 18-inch wheels provide a distinctive appearance and a sturdy foundation for the vehicle.

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