2021 GMC Sierra 1500 AT4 Asking $35,500 or best offer. Make and Offer and lets see may even take Partial Trade.(Ev Dirt bike, 90's Corvette, Boat, 25 Ft Enclosed Trailer

This has been a great truck. I purchased a new truck.

021 GMC Sierra AT4 – Overview

The 2021 GMC Sierra AT4 is an off-road–focused version of GMC’s full-size Sierra pickup, positioned between luxury and rugged capability. It combines premium interior features with factory-installed off‑road equipment, making it well suited for drivers who want both trail readiness and everyday comfort.

Exterior & Design

The AT4 stands out with a bold, aggressive appearance designed to signal its off-road purpose:

• 2-inch factory suspension lift

• Standard four-wheel drive

• All-terrain tires on 18-inch machined aluminum wheels

• Blacked-out grille, badging, and gloss-black skid plates

• Red recovery hooks mounted in the front bumper

• Available carbon composite bed (lighter and corrosion-resistant)

Its higher stance and darker styling give it a distinct, capable look compared to standard Sierra trims.

Interior & Comfort

Inside, the Sierra AT4 blends rugged durability with upscale touches:

• Leather-appointed seating with heated and ventilated front seats (when equipped)

• AT4-exclusive interior accents and contrast stitching

• Heated leather-wrapped steering wheel

• Spacious crew cab layout with generous rear-seat legroom

• Durable materials designed to handle outdoor use without sacrificing comfort

Technology & Safety

The 2021 Sierra AT4 includes modern technology and driver assistance features:

• 8-inch GMC Infotainment System with Apple CarPlay & Android Auto

• Available head-up display

• Available HD surround vision camera system

• Multiple USB ports and available wireless charging

• Standard safety features like:

• Forward collision alert

• Automatic emergency braking

• Lane departure warning

The AT4 offers a range of engines to suit different needs:

• 3.0L Duramax Turbo-Diesel (inline-6) – excellent torque and fuel economy

All engines are paired with advanced transmissions and a two-speed transfer case for off-road versatility.

Off-Road Capability

What truly defines the AT4 is its off-road equipment:

• Rancho monotube shocks

• Skid plates protecting key underbody components

• Hill descent control

• Locking rear differential

• Excellent towing capacity while retaining trail capability

Overall Character

The 2021 GMC Sierra AT4 is ideal for buyers who want:

• Serious off-road hardware straight from the factory

• A refined, comfortable cabin

• Strong towing capability

• A distinctive, premium truck aesthetic

It sits comfortably between hardcore off-road trucks and luxury pickups, offering a well-balanced blend of both worlds.