This 2021 GMC Yukon AT4 represents the full-size SUV experience you're seekingâ"capable, well-appointed, and ready for whatever your lifestyle demands.
- Dual-Pane Panoramic Power Sunroof
- AT4 Premium Plus Package
- Max Trailering Package
- 15" Diagonal Multi-Color Head-Up Display
- Air Ride Adaptive Suspension with Magnetic Ride Control
- Apple CarPlay and Android Auto Integration
- HD Surround Vision
- Heated and Ventilated Driver and Front Passenger Seats
- Perforated Leather Seating Surfaces
- Power-Retractable Assist Steps with Perimeter Lighting
- Lane Keep Assist with Lane Departure Warning
- Rear Media and Navigation Package
- Premium Capability Package with Active Response 4WD
- Radio with SiriusXM 360L and Navigation
- Bose 9-Speaker Premium Audio System
The heart of this Yukon is its EcoTec3 5.3L V8 engine paired with a 10-speed automatic transmission and 4WD capability. This powertrain balances performance with responsible fuel economy, delivering 16 city and 20 highway mpg. Whether you're navigating daily commutes or tackling challenging terrain, the Active Response 4WD system intelligently distributes power to optimize traction and stability.
Inside, you'll find a thoughtfully designed cabin built for comfort and convenience. The heated and ventilated front seats, heated steering wheel, and dual-zone climate control ensure comfort in any season. Second-row bucket seats with power release offer passenger-centered comfort, while the available third-row split-bench seating expands your capacity for family adventures. The panoramic sunroof floods the cabin with natural light and openness.
Technology seamlessly integrates into your daily drive. The 15-inch head-up display keeps critical information in your sightline. Apple CarPlay and Android Auto connectivity allows your smartphone to work as an extension of the vehicle. The SiriusXM radio with 360L content combined with the navigation system keeps you informed and entertained. Safety features including lane keep assist, lane change alert with side blind zone alert, and rear pedestrian alert provide additional confidence on every drive.
The AT4 package elevates capability with features designed for those who venture beyond pavement. Hill descent control, integrated trailer brake controller, and hitch guidance technology support towing and off-road exploration. The adaptive air suspension adjusts to road conditions, while the electronic limited slip differential enhances traction. Recovery hooks and an all-terrain-ready suspension geometry complement the rugged AT4 philosophy.
Practical features enhance daily functionality. The power liftgate, backup camera, and HD surround vision simplify loading and parking duties. Heated door mirrors, rain-sensing wipers, and rear window defroster handle harsh weather conditions. The power-sliding center console with drawer storage maximizes interior organization.
This 2021 GMC Yukon AT4 combines luxury appointments with genuine capabilityâ"a vehicle engineered for buyers who refuse to compromise on comfort, technology, or performance. We invite you to visit our showroom and experience this outstanding SUV firsthand.
Used 2021 GMC Yukon AT4 4x4 SUV
- Used
- Retail Value
- $41,995
- Savings
- -$1,045
- Price
- $40,950
- Doc Prep Fee
- $250
- Price After Fees
- $41,200
- Dealer Added Optional Accessories
- $399
Kenny Kent Toyota
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The overview
- Exterior Color
- Summit White
- Interior Color
- Jet Black/Brandy
- Odometer
- 100,678 miles
- Fuel Economy
- 16/20 MPG City/Hwy
- Transmission
- 10-Speed Automatic with Overdrive
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 1GKS2CKD1MR316968
- Stock Number
- P23735A
The highlights
- Lane departure
- Leather upholstery
- Automatic temperature control
- Emergency communication system
- Wireless phone connectivity
- Parking sensors
- Exterior parking camera rear
- Front dual zone A/C
- Auto high-beam headlights
- Rain sensing wipers
- Auto-dimming rearview mirror
- 3rd row seats
The full specifications
- 1-touch down
- 1-touch up
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Emergency communication system: OnStar Guidance
- Front beverage holders
- Front dual zone A/C
- Garage door transmitter
- Heated steering wheel
- Illuminated entry
- Memory seat
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power windows
- Proximity key: doors and push button start
- Rear air conditioning
- Rear beverage holders
- Rear door bins
- Remote engine start: keyfob
- Remote keyless entry
- Speed control
- Steering wheel memory
- Telescoping steering wheel
- Tilt steering wheel
- Trunk/hatch auto-latch
- Adaptive suspension
- Alloy wheels
- Four wheel independent suspension
- Front anti-roll bar
- Front tires: 275/60SR20.0
- Power steering
- Rear anti-roll bar
- Rear tires: 275/60SR20.0
- Speed-sensing steering
- Tires: all-terrain
- Wheel size: 20"
- 1st row LCD monitors: 2
- AM/FM radio: SiriusXM with 360L
- Primary LCD size: 10.2"
- Smart device integration: Android Auto/Apple CarPlay
- Speaker type: Bose
- Speakers: 9
- Steering wheel mounted audio controls
- Turn-by-turn navigation directions: OnStar Turn-by-Turn Navigation
- Wireless phone connectivity: Bluetooth
- 3rd row seats: split-bench
- Front center armrest
- Front seats: bucket
- Heated front seats
- Heated rear seats
- Leather upholstery
- Power 4-way driver lumbar support
- Power 4-way passenger lumbar support
- Power driver seat
- Power passenger seat
- Rear seat center armrest
- Rear seats Folding position: tumble forward
- Seat Upholstery: leather
- Split folding rear seat
- Ventilated front seats
- Compressor: Not Available
- Cylinder configuration: V-8
- Cylinder deactivation
- Drive type: four-wheel
- Engine liters: 5.3L
- Engine location: front
- Fuel economy city: 16mpg
- Fuel economy combined: 18mpg
- Fuel economy highway: 20mpg
- Fuel tank capacity: 24.0gal.
- Horsepower: 355hp @ 5,600RPM
- Hybrid traction battery type: none
- Manual-shift auto: Driver Shift Control
- Mode select transmission
- Number of valves: 16
- Recommended fuel: Regular Unleaded
- Standard fuel economy fuel type: gasoline
- Torque: 383 lb.-ft. @ 4,100RPM
- Transmission: 10 speed automatic
- Variable valve control
- Approach angle: 32 deg
- Departure angle: 21 deg
- Ground clearance (min): 203mm (8.0")
- Ramp breakover angle: 19 deg
- Auto-dimming door mirrors
- Bumpers: body-color
- Door mirrors: body-color
- Heated door mirrors
- Power door mirrors
- Power liftgate
- Rear cargo: power liftgate
- Skid plates
- Spoiler
- Trailer hitch receiver
- Trailer sway control
- Turn signal indicator mirrors
- 3rd row headroom: 970mm (38.2")
- 3rd row hiproom: 1,255mm (49.4")
- 3rd row legroom: 886mm (34.9")
- 3rd row shoulder room: 1,593mm (62.7")
- Compression ratio: 11.00 to 1
- Curb weight: 2,575kg (5,677lbs)
- Engine bore x stroke: 96.0mm x 92.0mm (3.78" x 3.62")
- Engine displacement: 5.3 L
- Engine horsepower: 355hp @ 5,600RPM
- Engine torque: 383 lb.-ft. @ 4,100RPM
- Exterior body width: 2,057mm (81.0")
- Exterior height: 1,943mm (76.5")
- Exterior length: 5,334mm (210.0")
- Front hiproom: 1,562mm (61.5")
- Front legroom: 1,130mm (44.5")
- Front shoulder room: 1,676mm (66.0")
- GVWR: 3,402kg (7,500lbs)
- Interior maximum rear cargo volume: 3,480 L (123 cu.ft.)
- Interior rear cargo volume: 722 L (26 cu.ft.)
- Payload: 772kg (1,702lbs)
- Rear hiproom: 1,557mm (61.3")
- Rear legroom: 1,067mm (42.0")
- Rear shoulder room: 1,646mm (64.8")
- Towing capacity: 3,493kg (7,700lbs)
- Turning radius: 6.1m (19.8')
- Wheelbase: 3,071mm (120.9")
- Appearance: digital/analog
- Auto high-beam headlights
- Blind spot: Lane Change Alert with Side Blind Zone Alert warning
- Compass
- Delay-off headlights
- Exterior parking camera rear: HD Rear Vision Camera yes
- Front fog lights
- Front reading lights
- Fully automatic headlights
- Lane departure: Lane Keep Assist with Lane Departure Warning active
- Low tire pressure warning
- Outside temperature display
- Parking sensors: Front and Rear Park Assist front and rear
- Rain sensing wipers
- Rear reading lights
- Rear window defroster
- Rear window wiper
- Tachometer
- Trip computer
- Variably intermittent wipers
- Voltmeter
- 4 wheel disc brakes
- ABS brakes
- Brake assist
- Dual front impact airbags
- Dual front side impact airbags
- Electronic stability
- Forward collision: Automatic Emergency Braking mitigation
- Front pedestrian detection: prevention
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Rear collision: Rear Cross-Traffic Alert warning
- Security system
- Tracker system
- Traction control
Notes from the dealer
KBB.com Consumer Reviews
- 5.0
Excellent Machine, Safety Features are Excessive
by BenInKentucky on 7/14/2026 10:14:58 PM
First, get the diesel. This is our 3rd diesel Yukon and they are amazing. Great mileage, great resale value, plenty of horse power, and the range for one tank of fuel can be very convenient on long road trips. The extra room in the XL model is also convenient for luggage if you have a large family and enjoy the ability to see out the back windows. The 10 speed transmission is smooth and it will glide down the interstate at any speed with ease at very low engine RPM. The only real downside to this vehicle are the overbearing safety features. If I look over at the navigation screen it vibrates the seat and tells me I am distracted. The auto-cruise (self-driving) feature will randomly hit the breaks in the middle of the highway. The backup camera will slam on the breaks if it sees any movement behind the vehicle even if it is way out of range. The back hatch opens automatically if you walk past it with the key in your pocket. If I lean too far on to the center console it will vibrate the seat and tell me I am distracted. We use this vehicle on the farm and there is no way to disable the seat belt alarm. We spent about an hour going through all of the settings and were able to disable most of the annoying features. I find putting a business card in front of the camera that looks at my face cures many of these frustrations and I may opt for a more permanent piece of black electrical tape that will blend in seamlessly. The auto stop feature is also frustrating but like the EPA gas cans I believe most of America is dealing with this frustration and it is not limited to this vehicle. Overall, we love the vehicle and will buy another one. - 5.0
No Problems Yet
by CoachTroy72 on 6/17/2026 11:26:04 PM
I got my 26 Yukon Denali SUV with 3 miles on it. Got to 308 and had engine knock. Took it to Classic GMC, they had it a week. Flushed out the engine debris, no knocking. Also they changed the oil. Not from 0-20w to 40w, but just changed it with the same OEM AC Delco standard Dexos, no more knocking. Now at 1238 miles havent had any issues. Actually getting 22.3 MPG! For a truck that is 17 city 20 Hwy.. - 5.0
Love everything about my Elevation, except…
by Carol Ann on 6/3/2026 5:57:12 PM
This truck has excellent get up and go power, great traction control and steering, with an impressive turning radius, love the large dash display screen, sleek design inside and out, and the suspension makes for comfortable long highway and city driving. Surrounded in cool luxury, state of the art sound system while feeling like a VIP in my classy black FBI looking whip.
Why Choose Kenny Kent Toyota
Purchase prices do not include tax, title and license. $250 Document Preparation Fee is included in the advertised price. Optional equipment and upgrades may be offered at time of sale for additional cost or removed by the dealer for no additional cost. Prices include the listed Factory Rebates and Incentives. Pricing also includes dealer adds. Please verify all information. We are not responsible for typographical, technical, or misprint errors. Inventory is subject to prior sale. Contact us via phone or email for more details.
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