Used 2021 GMCSierra 1500 AT4 Truck Crew Cab V-8 cyl
- Exterior Color
- Onyx Black
- Interior Color
- Jet Black
- Odometer
- 82,070 miles
- Fuel Economy
- 16/21 MPG City/Hwy
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 1GTP9EEL5MZ145055
- Stock Number
- MZ145055
GMC
Sierra 1500
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
- 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
- AT4 High Clearance Step (LPO)
- 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
- Wheel Locks (Set of 4) (LPO)
- Wheels: 20" x 9" 6-Spoke Carbon Gray Painted Alum
- Variably intermittent wipers
- 3.23 Rear Axle Ratio
- AT4 CarbonPro Edition
- AT4 Preferred Package
- AT4 Premium 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
Installed Packages & Options
- AT4 Premium Package$3,700
- AT4 Preferred Package
- Driver Alert Package I
- Technology Package$2,075
- 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
- AT4 Preferred Package$1,420
- 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
- Driver Alert Package II$1,095
- 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
- AT4 CarbonPro Edition$1,070
- Unique Grille Surround w/Black Chrome Finish
- AT4 Carbon Hard Badge
- MultiPro Audio System by Kicker
- Black Dual Exhaust Tips
- Driver Alert Package I$890
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
Included Options
- Wheels: 20" x 9" 6-Spoke Carbon Gray Painted Alum$800
Detailed Specifications
- 1st and 2nd row curtain head airbags
- 4-wheel ABS Brakes
- ABS and Driveline Traction Control
- Anti-theft alarm system
- Audio System Premium Brand: GMC Infotainment System
- Audio controls on steering wheel
- Automatic front air conditioning
- Auxilliary engine cooler
- Bluetooth wireless phone connectivity
- Braking Assist
- Bucket front seats
- Climate Controlled : Driver and passenger heated
- Compass
- Cruise control
- Cruise controls on steering wheel
- Daytime running lights
- Digital Audio Input
- Driver seat memory
- Driver's side electrochromatic auto-dimming mirrors
- Dual front air conditioning zones
- Dual illuminated vanity mirrors
- Dual reverse tilt mirrors
- Electrochromatic rearview mirror
- External temperature display
- Fold-up cushion rear seats
- Front Ventilated disc brakes
- Front and rear reading lights
- Front fog/driving lights
- Fuel Consumption: City: 16 mpg
- Fuel Consumption: Highway: 21 mpg
- Heated driver mirror
- Heated passenger mirror
- Heated steering wheel
- Leather seat upholstery
- Leather/metal-look steering wheel trim
- Machined aluminum rims w/ painted accents
- Manufacturer's 0-60mph acceleration time (seconds): 6.1 s
- Memorized Settings for 2 drivers
- Memorized Settings including door mirror(s)
- Metal-look dash trim
- Passenger Airbag
- Power remote w/tilt down driver mirror adjustment
- Power remote w/tilt down passenger mirror adjustment
- Power retractable mirrors
- Power windows
- Premium GMC Infotainment System
- Privacy glass: Deep
- Radio Data System
- Rear seats center armrest
- Remote Engine Start : Keyfob remote start
- Remote power door locks
- Remote window operation
- Side airbag
- Simulated wood/metal-look door trim
- SiriusXM with 360L AM/FM/HD/Satellite
- SiriusXM with 360L Satellite Radio
- Speed-proportional electric power steering
- Split rear bench
- Stability controll with anti-roll
- Suspension class: Off-road
- Tachometer
- Tilt and telescopic steering wheel
- Total Number of Speakers: 6
- Trailer hitch
- Trip computer
- Urethane shift knob trim
- Video Monitor Location: Front
- Wheel Diameter: 18
- Wheel Width: 8.5
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
Discover the ultimate in off-road capability and premium comfort with this stunning 2021 GMC Sierra 1500 AT4. Meticulously engineered to conquer any terrain, this remarkable truck is a true force to be reckoned with.
Highlighted by a bold, aggressive exterior and a host of advanced features, the Sierra 1500 AT4 is the perfect companion for your next adventure. This vehicle boasts:
⢠AT4 CarbonPro Edition
⢠AT4 Preferred Package
⢠AT4 Premium Package
⢠Driver Alert Package I
⢠Driver Alert Package II
⢠Preferred Equipment Group 4SB
⢠Technology Package
⢠Trailering Package
Elevating your driving experience, the Sierra 1500 AT4 is equipped with a powerful EcoTec3 6.2L V8 engine, delivering an impressive 420 horsepower and 460 lb-ft of torque. Paired with a 10-speed automatic transmission and 4-wheel drive, this truck is ready to tackle any terrain with confidence.
Indulge in the premium amenities that set the Sierra 1500 AT4 apart. Enjoy the exceptional sound quality of the MultiPro Audio System by Kicker, the convenience of the 8-inch Digital Driver Information Center, and the added safety of features like Forward Collision Alert, Lane Keep Assist, and Automatic Emergency Braking.
Step inside the cabin and discover the ultimate in comfort and style. Heated and ventilated front seats, a heated steering wheel, and a Multicolor 15-inch Head-Up Display ensure a truly luxurious driving experience. The CarbonPro composite bed and unique grille surround with black chrome finish add a touch of rugged sophistication to this remarkable vehicle.
Whether you're tackling the great outdoors or navigating the city streets, the 2021 GMC Sierra 1500 AT4 is the perfect companion. With its exceptional capabilities, premium features, and bold styling, this truck is the ultimate expression of power and refinement.
Experience the difference for yourself. Contact us today to schedule a test drive and discover why the Sierra 1500 AT4 is the perfect choice for your next adventure.
Highlighted by a bold, aggressive exterior and a host of advanced features, the Sierra 1500 AT4 is the perfect companion for your next adventure. This vehicle boasts:
⢠AT4 CarbonPro Edition
⢠AT4 Preferred Package
⢠AT4 Premium Package
⢠Driver Alert Package I
⢠Driver Alert Package II
⢠Preferred Equipment Group 4SB
⢠Technology Package
⢠Trailering Package
Elevating your driving experience, the Sierra 1500 AT4 is equipped with a powerful EcoTec3 6.2L V8 engine, delivering an impressive 420 horsepower and 460 lb-ft of torque. Paired with a 10-speed automatic transmission and 4-wheel drive, this truck is ready to tackle any terrain with confidence.
Indulge in the premium amenities that set the Sierra 1500 AT4 apart. Enjoy the exceptional sound quality of the MultiPro Audio System by Kicker, the convenience of the 8-inch Digital Driver Information Center, and the added safety of features like Forward Collision Alert, Lane Keep Assist, and Automatic Emergency Braking.
Step inside the cabin and discover the ultimate in comfort and style. Heated and ventilated front seats, a heated steering wheel, and a Multicolor 15-inch Head-Up Display ensure a truly luxurious driving experience. The CarbonPro composite bed and unique grille surround with black chrome finish add a touch of rugged sophistication to this remarkable vehicle.
Whether you're tackling the great outdoors or navigating the city streets, the 2021 GMC Sierra 1500 AT4 is the perfect companion. With its exceptional capabilities, premium features, and bold styling, this truck is the ultimate expression of power and refinement.
Experience the difference for yourself. Contact us today to schedule a test drive and discover why the Sierra 1500 AT4 is the perfect choice for your next adventure.
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 2019–2026 models. | Privacy
- Price
- $32,994
- We're here to help: 833-204-8520
- We're here to help: 833-204-8520




