CLEAN CARFAX! ACCIDENT FREE! NON-SMOKER! FLORIDA CAR! WELL MAINTAINED!
2020 GMC Sierra 1500 AT4 Crew Cab 4WD Duramax Diesel AT4 Premium & Technology Packages
This 2020 GMC Sierra 1500 AT4 Crew Cab 4WD is a standout combination of rugged off-road capability, refined luxury, and advanced technology. Finished in Onyx Black with a premium Jet Black interior featuring Kalahari accents, this AT4 offers a bold presence inside and out. Under the hood is the highly desirable 3.0L Duramax Turbo-Diesel engine, paired with a smooth-shifting 10-speed automatic transmission, delivering impressive torque, confident towing capability, and excellent overall drivability.
Designed for both work and adventure, this Sierra AT4 is equipped with a 4WD system featuring a 2-speed AutoTrac transfer case, an auto-locking rear differential, and the X31 Off-Road Suspension Package with a factory 2-inch lift and monotube shocks. Additional performance features include skid plates, hill descent control, high-duty air filtration, all-terrain tires, and Stabilitrak with trailer sway control and hill start assist. The integrated trailer package with trailer brake controller makes towing seamless and secure.
Inside the cabin, the AT4 delivers a premium driving experience. The interior features heated and ventilated front seats, heated rear outboard seats, and a heated leather-wrapped steering wheel, ensuring comfort in all seasons. Dual-zone automatic climate control, 10-way power front seats with memory, and a 60/40 split folding rear bench with under-seat storage add everyday practicality. Keyless open and start, along with remote start, provide added convenience.
This Sierra is exceptionally well equipped with the AT4 Premium Package, which includes a GMC Premium Infotainment System with navigation, an 8-inch HD touchscreen, Apple CarPlay and Android Auto capability, Bluetooth audio streaming, in-vehicle apps, and wireless phone charging. A Bose premium sound system delivers rich audio throughout the cabin. Additional features include front and rear park assist, lane change alert with side blind zone alert, rear cross traffic alert, a power sliding rear window, universal home remote, and black rectangular assist steps.
The Technology Package further enhances visibility and driver confidence with HD Surround Vision, a rear camera mirror, a bed view camera with trailer camera provisions, a multicolor head-up display, and an 8-inch digital driver information center. Safety is reinforced with the Driver Alert Package II, offering forward collision alert, lane keep assist with lane departure warning, automatic emergency braking, front pedestrian braking, adaptive cruise control, IntelliBeam automatic high beams, and a safety alert seat.
Exterior highlights include the GMC MultiPro Tailgate, spray-on bedliner with AT4 logo, LED headlamps, fog lamps, signature daytime running lights, power-folding heated mirrors with auto-dimming, 20-inch machined aluminum wheels with carbon gray accents, dual exhaust with premium tips, red front recovery hooks, and a CornerStep rear bumper.
This Sierra AT4 is a well-rounded, feature-rich truck built to handle demanding tasks while providing exceptional comfort, technology, and capability for everyday driving or off-road adventures.
Used 2020 GMCSierra 1500 AT4 Truck Crew Cab I-6 cyl
- Diesel
- Exterior Color
- Onyx Black
- Interior Color
- Jet Black
- Odometer
- 60,501 miles
- Body/Seating
- Truck Crew Cab/5 seats
- Fuel Economy
- 16/21 MPG City/Hwy
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4x4
- Engine
- I-6 cyl
- VIN
- 3GTU9EET9LG180702
- Stock Number
- 25200A
Highlighted Features
- Leather upholstery
- Automatic temperature control
- Premium audio system
- 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
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
- 6" Rectangular Black Tubular Assist Steps (LPO)
- Auto-dimming door mirrors
- Bumpers: body-color
- Heated door mirrors
- Power door mirrors
- Rear step bumper
- 2 USB Ports (1st Row)
- All-Weather Floor Liners w/AT4 Logo (LPO)
- 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 front seats
- Heated rear 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
- Wheels: 20" x 9" Machined Aluminum
- Variably intermittent wipers
- 3.23 Rear Axle Ratio
- 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
- HD Radio
- 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
- 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 - Camera
- Heavy-Duty Rear Locking Differential
- 170 Amp Alternator
- Auxiliary External Transmission Oil Cooler
- Body-Color Surround Grille
- High Gloss Black Mirror Caps
- High-Capacity Air Filter
- IntelliBeam Automatic High Beam On/Off
- LED Cargo Area Lighting
- ProGrade Trailering System
- Rear Wheelhouse Liners
- Spray-On Pickup Bed Liner w/AT4 Logo
- 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
- 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
- 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 2nd Row Outboard 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
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 wheel independent suspension
- Power steering
- Speed-sensing steering
- Tires: all-terrain
- 1st row LCD monitors: 2
- AM/FM radio: SiriusXM with 360L
- Premium audio system: Premium GMC Infotainment System
- Primary LCD size: 8.0"
- Radio data system
- Satellite radio trial duration with new vehicle purchase (months): 3
- 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
- Heated rear 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 fuel type: gasoline
- Fuel economy highway: 21mpg
- Fuel tank capacity: 24.0gal.
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Rear locking differential
- 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
- High Gloss Black Mirror Caps
- 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 - Camera
- Following Distance Indicator
- Safety Alert Seat
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
- Radio: Premium GMC Infotainment Sys w/Multi-Touch
- HD Radio
- 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
- 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
- Heated 2nd Row Outboard 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
- High-Capacity Air Filter
- Auxiliary External Transmission Oil Cooler
- Heavy-Duty Rear Locking Differential
- Hill Descent Control
- Off-Road Suspension
- Hitch Guidance
- Integrated Trailer Brake Controller
- SiriusXM w/360L
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Driver Memory
- 120-Volt Bed Mounted Power Outlet
- 6-Speaker Audio System Feature
- SiriusXM w/360L
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering App
Dealer Notes
KBB.com Consumer Reviews
- 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!
All vehicle specifications, prices and equipment are subject to change without notice. See above for information on purchase financing and lease program expiration dates. Prices and payments (including the amount down payment) do not include tax, titles, tags, documentation charges, emissions testing charges, or other fees required by law or lending organizations. The estimated payments may not include upfront finance charges that must be paid to be eligible for the purchase financing program used to estimate the APR and payments. Listed Annual Percentage Rates are provided for the selected purchase financing or lease programs available on the current date. Program expiration dates reflect currently announced program end dates, but these programs are subject to change at any time.
Lessees will be financially responsible for mileage beyond the elected quantity and for vehicle maintenance and repairs and excessive vehicle wear. Option to purchase at lease end for an amount may be determined at lease signing. Payments may be higher in some states. You may not be able to combine other incentives with the purchase financing or leasing programs presented above. Residency restrictions may apply. See dealer for details.
Listed APR, down payment, payments, incentives and other terms are estimates for example purposes only. Information provided is based on very well-qualified buyers or lessees. The payment information provided here is not a commitment by any organization to provide credit, leases or other programs. Some customers may not qualify for listed programs. Your terms may vary. Lessor must approve lease. Credit approval required.