This 2021 GMC Sierra 1500 AT4 combines rugged capability with refined comfort, designed for those who demand both performance and style in their daily drive and weekend adventures.
- 3.0L Duramax I-6 Diesel Turbocharged engine with 277 hp and 460 lb-ft of torque
- 4WD with off-road suspension and hill descent control
- AT4 CarbonPro Edition with carbon composite bed and unique black chrome grille surround
- Technology Package featuring HD surround vision, rear camera mirror, bed view camera, and 15" head-up display
- Driver Alert Package II with forward collision alert, lane keep assist, automatic emergency braking, and adaptive cruise control
- Power sunroof with automatic operation
- Multicolor 15" head-up display and 8" digital driver information center
- MultiPro Audio System by Kicker premium audio
- Heated and ventilated leather front seats with 10-way power adjustment
- Apple CarPlay and Android Auto compatibility
- 4G LTE Wi-Fi hotspot capability
- Wireless charging and multiple USB ports
The 3.0L Duramax diesel engine delivers impressive torque for towing and hauling, while the 10-speed automatic transmission provides smooth power delivery in all conditions. With 22 city and 26 highway MPG, this truck balances capability with efficiency. The 4WD system pairs with off-road suspension and hill descent control to handle challenging terrain, while the auto-locking rear differential adds confidence when navigating rough surfaces.
The AT4 CarbonPro Edition elevates this truck with distinctive styling elements. The carbon composite bed resists dents and dings, reducing maintenance concerns over time. Black dual exhaust tips and the unique grille surround with black chrome finish give this Sierra a commanding presence on any road.
Inside, the cabin showcases premium materials and thoughtful design. Perforated leather-appointed front seats with heating and ventilation ensure comfort during long drives. The heated steering wheel and dual-zone automatic climate control adapt to your preferences. The multicolor head-up display keeps vital information within your line of sight, while the 8" digital driver information center provides detailed vehicle data at a glance.
Safety technology is comprehensive with the Driver Alert Package II, which includes forward collision alert, lane keep assist with lane departure warning, automatic emergency braking, and front pedestrian braking. The adaptive cruise control maintains your set distance from vehicles ahead. Ultrasonic front and rear park assist adds convenience during tight maneuvers. The safety alert seat provides tactile feedback during potential hazards.
Technology connectivity enhances every journey through the premium GMC infotainment system, which integrates Apple CarPlay and Android Auto for seamless smartphone integration. SiriusXM with 360L satellite radio delivers entertainment nationwide. The 4G LTE Wi-Fi hotspot keeps passengers connected, while wireless charging eliminates cable clutter on the center console.
Visit our showroom to experience this Sierra firsthand and discover why the AT4 stands as the choice for those seeking a truck that excels both on and off the pavement.
Used 2021 GMCSierra 1500 AT4
- Diesel
- Exterior Color
- Summit White
- Interior Color
- Jet Black
- Odometer
- 120,460 miles
- Body/Seating
- Truck Crew Cab/5 seats
- Seats
- 5 seats
- Fuel Economy
- 16/21 MPG City/Hwy
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4x4
- Engine
- I-6 cyl
- VIN
- 1GTU9EET5MZ226091
- Stock Number
- MZ226091
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
- 6 Speakers
- AM/FM radio: SiriusXM with 360L
- Premium audio system: GMC Infotainment System
- Radio data system
- Air Conditioning
- Automatic temperature control
- Front dual zone A/C
- Rear window defroster
- Memory seat
- Power driver seat
- Power steering
- Power windows
- Remote keyless entry
- Steering wheel mounted audio controls
- Speed-sensing steering
- Traction control
- 4-Wheel Disc Brakes
- ABS brakes
- Dual front impact airbags
- Dual front side impact airbags
- Front anti-roll bar
- Front wheel independent suspension
- Low tire pressure warning
- Occupant sensing airbag
- Overhead airbag
- Power Sunroof
- Brake assist
- Electronic Stability Control
- Delay-off headlights
- Front fog lights
- Fully automatic headlights
- Panic alarm
- Security system
- Theft Deterrent System (Unauthorized Entry)
- Speed control
- 220 Amp Alternator
- Engine Block Heater
- Auto-dimming door mirrors
- Bumpers: body-color
- CarbonPro (Carbon Fiber Composite) Bed
- Front License Plate Kit
- Heated door mirrors
- Power door mirrors
- Rear step bumper
- 2 USB Ports (1st Row)
- Apple CarPlay/Android Auto
- Auto-dimming Rear-View mirror
- Driver door bin
- Driver vanity mirror
- Front reading lights
- Heated steering wheel
- Illuminated entry
- Outside temperature display
- Overhead console
- Passenger vanity mirror
- Rear reading lights
- Rear seat center armrest
- Tachometer
- Telescoping steering wheel
- Tilt steering wheel
- Trip computer
- Voltmeter
- Front Center Armrest
- Heated 2nd Row Outboard Seats
- Heated front seats
- Perforated Leather-Appointed Front Seat Trim
- Power passenger seat
- Split folding rear seat
- Ventilated front seats
- Passenger door bin
- 18" x 8.5" Machined Aluminum Wheels
- Alloy wheels
- Variably intermittent wipers
- 3.23 Rear Axle Ratio
- AT4 CarbonPro Edition
- AT4 Preferred Package
- AT4 Value Package
- Driver Alert Package I
- Driver Alert Package II
- Preferred Equipment Group 4SB
- Technology Package
- Trailering Package
- 6-Speaker Audio System Feature
- MultiPro Audio System by Kicker
- Premium Bose 7-Speaker Sound System
- Radio: Premium GMC Infotainment Sys w/Multi-Touch
- Radio: Premium GMC Infotainment Sys w/Navigation
- SiriusXM w/360L
- Steering Wheel Audio Controls
- Electric Rear-Window Defogger
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 120-Volt Instrument Panel Power Outlet
- Driver Memory
- Power Front Passenger Windows w/Express Up/Down
- Power Front Windows w/Driver Express Up/Down
- Power Rear Windows w/Express Down
- Remote Vehicle Starter System
- Universal Home Remote
- Auto-Locking Rear Differential
- Electrical Lock Control Steering Column
- Manual Tilt-Wheel & Telescoping Steering Column
- Off-Road Suspension
- Keyless Open & Start
- Power Door Locks
- Hill Descent Control
- Perimeter Lighting
- Adaptive Cruise Control
- 170 Amp Alternator
- Auxiliary External Transmission Oil Cooler
- Heavy-Duty Air Filter
- AT4 Carbon Hard Badge
- Black Dual Exhaust Tips
- Body-Color Surround Grille
- IntelliBeam Automatic High Beam On/Off
- LED Cargo Area Lighting
- ProGrade Trailering System
- Rear Wheelhouse Liners
- Spray-On Pickup Bed Liner w/AT4 Logo
- Unique Grille Surround w/Black Chrome Finish
- 2 USB Ports
- 4.2" Diagonal Color Display Driver Info Center
- 4G LTE Wi-Fi Hotspot Capable
- 8" Driver Information Center
- Automatic Emergency Braking
- Bed View Camera
- Color-Keyed Carpeting Floor Covering
- Compass
- Floor-Mounted Center Console
- Following Distance Indicator
- Forward Collision Alert
- Front Pedestrian Braking
- Front Prem Floor Liners w/Removable Carpet Insert
- GMC Connected Access Capable
- HD Rear Vision Camera
- HD Surround Vision w/2 Trailer View Camera Provisions
- Lane Change Alert w/Side Blind Zone Alert
- Lane Keep Assist w/Lane Departure Warning
- Multicolor 15" Diagonal Head-Up Display
- OnStar & GMC Connected Services Capable
- Rear Camera Mirror
- Rear Cross Traffic Alert
- Rear Dual USB Charging-Only Ports
- Rear Prem Floor Liners w/Removable Carpet Insert
- Safety Alert Seat
- Ultrasonic Front & Rear Park Assist
- Wireless Charging
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Front Bucket Seats
- Heated Driver & Front Outboard Passenger Seating
- Ventilated Driver & Front Passenger Seats
- Hitch Guidance
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering App
- Integrated Trailer Brake Controller
- Red Recovery Hooks
- Deep-Tinted Glass
- Power Sliding Rear Window w/Rear Defogger
Standard 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 wheel independent suspension
- Power steering
- Speed-sensing steering
- Tires: all-terrain
- 1st row LCD monitors: 2
- 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: 16mpg
- Fuel economy combined: 18mpg
- Fuel economy highway: 21mpg
- Fuel tank capacity: 24.0gal.
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Rear locking differential
- Standard fuel economy fuel type: gasoline
- 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
- 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")
- 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
- AT4 Preferred Package
- Driver Alert Package I
- HD Surround Vision w/2 Trailer View Camera Provisions
- Rear Camera Mirror
- Bed View Camera
- Multicolor 15" Diagonal Head-Up Display
- 8" Driver Information Center
- Universal Home Remote
- Power Sliding Rear Window w/Rear Defogger
- Radio: Premium GMC Infotainment Sys w/Navigation
- Premium Bose 7-Speaker Sound System
- Wireless Charging
- Forward Collision Alert
- Lane Keep Assist w/Lane Departure Warning
- Automatic Emergency Braking
- Front Pedestrian Braking
- IntelliBeam Automatic High Beam On/Off
- Adaptive Cruise Control
- Following Distance Indicator
- Safety Alert Seat
- Unique Grille Surround w/Black Chrome Finish
- AT4 Carbon Hard Badge
- MultiPro Audio System by Kicker
- Black Dual Exhaust Tips
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
- SiriusXM w/360L
- 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
- 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
- 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
- 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
- Off-Road Suspension
- Integrated Trailer Brake Controller
- Hitch Guidance
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering App
Dealer Notes
KBB.com Consumer Reviews
* The advertised price does not include sales tax, vehicle registration fees, other fees required by law, finance charges and any documentation charges. Doc fee is $299. A negotiable administration fee, up to $115, may be added to the price of the vehicle.
* Images, prices, and options shown, including vehicle color, trim, options, pricing and other specifications are subject to availability, incentive offerings, current pricing and credit worthiness.