Quality Buick GMC

1620 East Homer Adams Pkwy Alton, IL 62002

2021 GMC Yukon AT4 OVERVIEW Overview Icon

2021 GMC Yukon AT4 in Alton

2021 GMC Yukon AT4 Main Img

2021 GMC Yukon AT4 MODELS

  • Yukon AT4

    Yukon AT4



GMC Yukon AT4 Dealer in Alton

2021 GMC Yukon AT4 PERFORMANCE Performance Icon

2021 GMC Yukon AT4 performance

All-New Active Response 4WD System

The available Active Response 4WD system (late availability) helps you confidently maneuver in slick or off-road conditions by seamlessly sending optimal torque to each wheel to improve traction.

2021 GMC Yukon AT4 performance

Traction Select System

The Traction Select System allows you to quickly switch between available traction configurations including Sport mode, Off-Road mode (4WD models only), and Tow/Haul mode to optimize powertrain calibrations, traction control settings and stability control system calibrations for a variety of terrain and driving conditions.

2021 GMC Yukon AT4 performance

Hill Descent Control

Activated by a push of a button on the instrument panel, the available Hill Descent Control uses antilock braking to help provide a smooth, controlled descent while traveling on steep declines. Available on AT4 and Denali 4WD models.

2021 GMC Yukon AT4 performance

Hill Start Assist

Hill Start Assist holds the brakes momentarily to give you extra time to switch from the brake to the accelerator under certain conditions.

2021 GMC Yukon AT4 APPEARANCE Appearance Icon

2021 GMC Yukon AT4 Appearance Main Img
2021 GMC Yukon AT4 appearance

AT4-Specific Front Design

AT4-Specific Front Design Featuring Skid Plate and Approach Angle of Nearly 32 Degrees.

2021 GMC Yukon AT4 appearance

Red Recovery Hooks

Horizontal Red Recovery Hooks.

2021 GMC Yukon AT4 appearance

20" 6-Spoke Machined Aluminum Wheels

20" 6-Spoke Machined Aluminum Wheels With Carbon Gray Metallic Accents and 20" Goodyear® All-Terrain Tires.

2021 GMC Yukon AT4 COMFORT Comfort Icon

2021 GMC Yukon AT4 comfort

Rugged AT4 Interior

The First Ever Yukon AT4 features an athletic Jet Black interior with AT4-exclusive Brandy accents and dark brushed aluminum details. Enhance every drive with heated and ventilated driver and front-passenger leather seating surfaces that include embroidered AT4 badging on the front-seat head restraints.

2021 GMC Yukon AT4 comfort

10.2" Diagonal Premium GMC Infotainment System with Available Navigation

Stay connected, entertained and informed with advanced connectivity features that include: an available 4G LTE Wi-Fi® Hotspot, available advanced Navigation and downloadable in-vehicle apps. Available on SLT, AT4 and standard on Denali.

2021 GMC Yukon AT4 comfort

Class-Leading Power-Sliding Center Console

At the touch and hold of a button, the available Power-Sliding Center Console (late availability) conveniently slides back up to 10" to provide additional storage room for personal items. It also features a hidden storage drawer that can be secured when the vehicle is in Valet mode.

2021 GMC Yukon AT4 comfort

Denali-Exclusive 14-Speaker Bose® Audio System

Enjoy impressive sound quality with Bose® audio featuring 14 speakers with Centerpoint® surround sound.

2021 GMC Yukon AT4 comfort

Charging Stations

  • Available Wireless Charging
  • Up to Eight USB Ports
  • Two 110-Volt Power Outlets
  • One 12-Volt Power Outlet
2021 GMC Yukon AT4 comfort

Dual 12.6" Diagonal Rear-Seat Media Touch-Screens

The all-new available Rear-Seat Media System features dual 12.6" diagonal high-definition touch-screens that feature tilting, screen sharing and touch capabilities. Available on SLT, AT4 and Denali.

2021 GMC Yukon AT4 SAFETY & WARRANTY Safety Icon


Standard on every new GMC - GMC Pro Grade Protection has you truly protected with features and services including:

  • 3-year / 36,000-mile Bumper-to-Bumper Limited Warranty
  • 5-year / 60,000-mile Powertrain Limited Warranty
  • 5-year / 60,000-mile Roadside Assistance & Courtesy Transportation
  • 3-year / 36,000-mile Corrosion Protection
  • 6-year / 100,000-mile Rust-Through Protection
  • First maintenance visit
2021 GMC Yukon AT4 Safety Main Img
2021 GMC Yukon AT4 safety

Class-Leading Nine Camera Views

Confidently maneuver through your surroundings with class-leading nine available camera views, including High Definition Surround Vision, and the Rear Camera Mirror that provides a wider, less-obstructed, view behind your vehicle compared to a traditional rearview mirror.

2021 GMC Yukon AT4 safety


The Automatic Emergency Braking operates below 50 mph, and can alert you when it detects a front-end collision is imminent with a vehicle ahead you are following. It also can help reduce the collision’s severity or avoid the collision by automatically applying hard emergency braking if you have not already, or by enhancing driver hard braking.

2021 GMC Yukon AT4 safety


The available Rear Cross Traffic Alert can alert you of detected left- or right-cross traffic behind your vehicle when you’re in Reverse.

We're sorry, but we do not have a 2021 GMC Yukon AT4 in our current inventory.

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