Discover the Unparalleled Capability and Refinement of the 2021 GMC Sierra 1500 AT4
Elevate your driving experience with the exceptional 2021 GMC Sierra 1500 AT4. This powerful and versatile truck is built to conquer any terrain, while offering a level of comfort and technology that will redefine your expectations.
Key Features:
6.2L EcoTec3 V8 engine with Dynamic Fuel Management
20" Machined Aluminum Wheels with Carbon Grey Metallic Accents
LT265/60R20 MT Blackwall Goodyear Wrangler Territory Tires
Trailering Package with Integrated Trailer Brake Controller
ProGrade Trailering System with Hitch Guidance and Hitch View
In-Vehicle Trailering App
Spray-On Pickup Bed Liner with AT4 Logo
120-Volt Bed Mounted Power Outlet
Heated Steering Wheel
Heated and Ventilated Front Seats
Perforated Leather-Appointed Front Seat Trim
10-Way Power Driver and Passenger Seats with Lumbar Support
Bose Premium Audio System
4G LTE Wi-Fi Hotspot Capability
Apple CarPlay and Android Auto Integration
Beneath the muscular exterior lies a refined and capable powertrain that delivers exceptional performance. The 6.2L EcoTec3 V8 engine, paired with a 10-speed automatic transmission, unleashes 420 horsepower and 460 lb-ft of torque, providing the power you need to conquer any task. The advanced Dynamic Fuel Management system seamlessly adjusts cylinder deactivation to optimize efficiency, ensuring you get the most out of every drop of fuel.
The Sierra 1500 AT4 is designed to take you further, both on and off the road. The off-road-tuned suspension, locking rear differential, and Goodyear Wrangler Territory tires provide the confidence and capability to tackle the toughest terrain. The ProGrade Trailering System, complete with Hitch Guidance and Hitch View, makes hitching and towing a breeze, while the In-Vehicle Trailering App provides comprehensive control and monitoring.
Inside, the Sierra 1500 AT4 offers a level of refinement that will impress even the most discerning driver. The perforated leather-appointed front seats, heated steering wheel, and dual-zone automatic climate control create a sanctuary of comfort, while the Bose premium audio system and 4G LTE Wi-Fi hotspot keep you connected and entertained.
Experience the uncompromising capability and premium refinement of the 2021 GMC Sierra 1500 AT4. Visit our showroom today and let us demonstrate why this truck is the perfect choice for your next adventure.
Used 2021 GMCSierra 1500 AT4 Truck Crew Cab
- Exterior Color
- Satin Steel
- Interior Color
- Jet Black
- Odometer
- 58,163 miles
- Body/Seating
- Truck Crew Cab/5 seats
- Fuel Economy
- 15/19 MPG City/Hwy
- Transmission
- Automatic
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 3GTP9EEL0MG454240
- Stock Number
- 26T316A
GMC
Sierra 1500
Highlighted Features
- Leather upholstery
- Automatic temperature control
- Wireless phone connectivity
- Front dual zone A/C
- Auto-dimming rearview mirror
- Split folding rear seat
- Memory seat
- Heated front seats
- Ventilated front seats
- Perimeter/approach lights
- Remote keyless entry
- Heated steering wheel
Included Packages & Accessories
- 3.23 Rear Axle Ratio
- Wheels: 20" x 9" Machined Aluminum
- Front License Plate Kit
- GVWR: 7,000 lbs
- Not Equipped w/Heated 2nd Row Outboard Seats
- Not Equipped w/HD Radio
- Not Equipped w/Automatic Stop/Start
- Transmission: 10-Speed Automatic
- Tires: LT265/60R20 MT BW
- 265/70R17SL AS BW Spare Tire
- Engine: 6.2L EcoTec3 V8
- 2-Speed Transfer Case
- Radio: Premium GMC Infotainment Sys w/Multi-Touch
- 6-Speaker Audio System Feature
- SiriusXM w/360L
- Front Bucket Seats
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Driver Memory
- Preferred Equipment Group 4SB
- Floor-Mounted Center Console
- Compass
- 4.2" Diagonal Color Display Driver Info Center
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- Color-Keyed Carpeting Floor Covering
- Front Prem Floor Liners w/Removable Carpet Insert
- Rear Prem Floor Liners w/Removable Carpet Insert
- OnStar & GMC Connected Services Capable
- 4G LTE Wi-Fi Hotspot Capable
- GMC Connected Access Capable
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Instrument Panel Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 2 USB Ports
- Rear Dual USB Charging-Only Ports
- HD Rear Vision Camera
- Heated Driver & Front Outboard Passenger Seating
- Ventilated Driver & Front Passenger Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel & Telescoping Steering Column
- Electrical Lock Control Steering Column
- Theft Deterrent System
- Power Front Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- Spray-On Pickup Bed Liner w/AT4 Logo
- Deep-Tinted Glass
- Body-Color Surround Grille
- LED Cargo Area Lighting
- Red Recovery Hooks
- Tires: 265/65R18SL AT BW
- Wheels: 18" x 8.5" Machined Aluminum
- Rear Wheelhouse Liners
- Trailering Package
- Hitch Guidance
- ProGrade Trailering System
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering App
- 170 Amp Alternator
- Heavy-Duty Air Filter
- Auxiliary External Transmission Oil Cooler
- Auto-Locking Rear Differential
- Hill Descent Control
- Skid Plates
- Off-Road Suspension
- Integrated Trailer Brake Controller
Included Packages & Options
- Engine: 6.2L EcoTec3 V8$2,495
- 2-Speed Transfer Case
- Tires: LT265/60R20 MT BW$295
- 265/70R17SL AS BW Spare Tire
Included Options
- Wheels: 20" x 9" Machined Aluminum$800
Detailed Specifications
- 1-touch down
- 1-touch up
- Air conditioning
- Auto-dimming rearview mirror
- Automatic temperature control
- Driver door bin
- Driver vanity mirror
- Front beverage holders
- Front dual zone A/C
- 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 beverage holders
- Rear door bins
- Remote engine start: keyfob
- Remote keyless entry
- Speed control
- Telescoping steering wheel
- Tilt steering wheel
- Alloy wheels
- Front anti-roll bar
- Front tires: 265/60QR20.0
- Front wheel independent suspension
- Power steering
- Rear tires: 265/60QR20.0
- Speed-sensing steering
- Tires: all-terrain
- Wheel size: 20"
- 1st row LCD monitors: 2
- AM/FM radio: SiriusXM
- Primary LCD size: 8.0"
- Radio data system
- Smart device integration: Apple CarPlay/Android Auto
- Steering wheel mounted audio controls
- Wireless phone connectivity: Bluetooth
- Front center armrest
- Front seats: bucket
- Heated front seats
- Leather upholstery
- Max seating capacity: 5
- Power 2-way driver lumbar support
- Power 2-way passenger lumbar support
- Power driver seat
- Power passenger seat
- Rear seat center armrest
- Rear seats: split-bench
- Rear seats Folding position: fold-up cushion
- Seat Upholstery: leather
- Split folding rear seat
- Ventilated front seats
- Cylinder deactivation
- Drive type: four-wheel
- Engine location: front
- Fuel economy city: 15mpg
- Fuel economy combined: 18mpg
- Fuel economy highway: 19mpg
- Fuel tank capacity: 24.0gal.
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Rear locking differential
- Recommended fuel: Premium Unleaded
- Standard fuel economy fuel type: gasoline
- Torque: 460 lb.-ft. @ 4,100RPM
- Transmission: 10 speed automatic
- Variable valve control
- Ground clearance (min): 276mm (10.9")
- Auto-dimming door mirrors
- Bedliner
- Bumpers: body-color
- Heated door mirrors
- Left rear passenger door: conventional
- Power door mirrors
- Rear cargo: tailgate
- Rear step bumper
- Right rear passenger: conventional
- Skid plates
- Trailer hitch receiver
- Trailer sway control
- Engine displacement: 6.2 L
- Engine torque: 460 lb.-ft. @ 4,100RPM
- Exterior body width: 2,063mm (81.2")
- Exterior height: 1,990mm (78.3")
- Exterior length: 5,885mm (231.7")
- Front headroom: 1,093mm (43.0")
- Front hiproom: 1,554mm (61.2")
- Front legroom: 1,131mm (44.5")
- Front shoulder room: 1,677mm (66.0")
- Rear headroom: 1,019mm (40.1")
- Rear hiproom: 1,530mm (60.2")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,655mm (65.2")
- Towing capacity: 3,901kg (8,600lbs)
- Turning radius: 7.1m (23.5')
- Wheelbase: 3,744mm (147.4")
- Appearance: analog
- Compass
- Delay-off headlights
- Front fog lights
- Front reading lights
- Fully automatic headlights
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- Rear reading lights
- Rear window defroster
- 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
- Ignition disable
- Occupant sensing airbag
- Overhead airbag
- Panic alarm
- Perimeter/approach lights
- Security system
- Traction control
Standard Features
- 2-Speed Transfer Case
- 265/70R17SL AS BW Spare Tire
- Radio: Premium GMC Infotainment Sys w/Multi-Touch
- Floor-Mounted Center Console
- Compass
- 4.2" Diagonal Color Display Driver Info Center
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- Color-Keyed Carpeting Floor Covering
- Front Prem Floor Liners w/Removable Carpet Insert
- OnStar & GMC Connected Services Capable
- 4G LTE Wi-Fi Hotspot Capable
- GMC Connected Access Capable
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Instrument Panel Power Outlet
- 2 USB Ports
- Rear Dual USB Charging-Only Ports
- HD Rear Vision Camera
- Heated Driver & Front Outboard Passenger Seating
- Ventilated Driver & Front Passenger Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel & Telescoping Steering Column
- Electrical Lock Control Steering Column
- Theft Deterrent System
- Power Front Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- Spray-On Pickup Bed Liner w/AT4 Logo
- Deep-Tinted Glass
- Body-Color Surround Grille
- LED Cargo Area Lighting
- Red Recovery Hooks
- Tires: 265/65R18SL AT BW
- Wheels: 18" x 8.5" Machined Aluminum
- Rear Wheelhouse Liners
- Trailering Package
- ProGrade Trailering System
- 170 Amp Alternator
- Heavy-Duty Air Filter
- Auxiliary External Transmission Oil Cooler
- Auto-Locking Rear Differential
- Hill Descent Control
- Skid Plates
- Off-Road Suspension
- Integrated Trailer Brake Controller
- 2-Speed Transfer Case
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Driver Memory
- Rear Prem Floor Liners w/Removable Carpet Insert
- 120-Volt Bed Mounted Power Outlet
- 6-Speaker Audio System Feature
- SiriusXM w/360L
- Hitch Guidance
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering App
Dealer Notes
KBB.com Consumer Reviews

Overall4Out of 5
- 3.0
Nice truck
By froggy | on Sunday, December 06, 2020
I purchased this truck brand new and at 3900 miles I started to have a misfire. The warranty put a refurbished rebuilt engine in it. I was not aware that the warranty doesn't put new parts in just refurbished rebuilt parts. I traded in and lost my favorite blue truck. Not a fan of the whole process. Love the truck just not how the warranty went. I would not own another brand or model the 2020 is the nicest riding and looking. Just got a bad motor from the manufacture.… - 5.0
Great Truck
By Mel | on Sunday, April 25, 2021
I love it, I get compliments every where I go, and it apparently worth more than I paid for it brand new, a year and a half later. can't ask for much more than that.… - 5.0
Well done GM
By Tony | on Thursday, November 26, 2020
This truck has a 10 speed transmission that you can barely feel it shift. Traded in an F150 and test drove a similar equipped Ram. Although the Ram was nice, the styling of the GMC won me over, along with the tailgate! It also pulls my boat way better than the Ford, just smoother all around. The cabin is very quiet and the gas mileage is much better than V8 Ford. The cabin is super quiet and the ride is awesome. Love the adaptive cruise control too. The technology is fine and the screen is plenty big. Remember, you are driving this truck, not going to thr drive in! Most importantly, the controls are simple to use and Bose stereo sounds great! Oh, and I got it cheaper than the similar Ram too!…
Based on 88 consumer ratings for 2019–2025 models. | Privacy
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