Pre-Owned 2020 GMCSierra 2500HD AT4
- Exterior Color
- Summit White
- Interior Color
- Jet Black
- Odometer
- 82,284 miles
- Body/Seating
- Truck Crew Cab/5 seats
- Transmission
- Automatic
- Drivetrain
- 4x4
- Engine
- V-8 cyl
- VIN
- 1GT49PEY8LF215836
- Stock Number
- 260065A
Highlighted Features
- Navigation system
- Leather upholstery
- Automatic temperature control
- Premium audio system
- Wireless phone connectivity
- Parking sensors
- Front dual zone A/C
- Auto-dimming rearview mirror
- Split folding rear seat
- Memory seat
- Heated front seats
- Ventilated front seats
Included Packages & Accessories
- Front License Plate Kit
- Hitch Package
- High Idle Switch
- Pickup Box
- LED Smoked Amber Roof Marker Lamps
- Bose Premium 7 Speaker Sound System
- Wireless Charging
- Wheels: 20" 6-Spoke Bright Machined Aluminum
- Lane Change Alert w/Side Blind Zone Alert
- Transmission: Allison 10-Speed Automatic
- Radio: Premium GMC Infotainment Sys w/Navigation
- GVWR: 11,350 lbs
- Ultrasonic Front & Rear Park Assist
- AT4 Premium Package
- AT4 Preferred Package
- Universal Home Remote
- Power Sliding Rear Window w/Defogger
- Driver Alert Package I
- Rear Cross Traffic Alert
- Perimeter Lighting
- 6" Rectangular Black Tubular Assist Steps
- Gooseneck/5th Wheel Prep Package
- Winter Grille Cover
- Engine Block Heater
- Front Bucket Seats
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Driver Memory
- Bed View Camera
- Preferred Equipment Group 4SB
- Radio: AM/FM w/Premium GMC Infotainment System
- 6-Speaker Audio System Feature
- SiriusXM w/360L
- HD Radio
- Floor-Mounted Center Console
- Compass Located In Instrument Cluster
- 4.2" Diagonal Color Display Driver Info Center
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- 1st & 2nd Rows All-Weather Floor Liners
- 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
- 2nd Row Dual USB Charge-Only Ports
- HD Rear Vision Camera
- Heated Driver & Front Outboard Passenger Seats
- Heated & Ventilated Front Bucket Seats
- Heated 2nd Row Outboard Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel/Telescoping Steering Column
- Electrical Lock Control Steering Column
- Unauthorized Entry Theft-Deterrent System
- Power Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- Spray-On Pickup Box Bed Liner w/AT4 Logo
- Deep-Tinted Glass
- Painted Black Surround Grille
- LED Cargo Area Lighting
- Red Recovery Hooks
- Rear Wheelhouse Liners
- X31 Off-Road Package
- Off-Road Suspension
- Hill Descent Control
- Skid Plates
- Integrated Trailer Brake Controller
- ProGrade Trailering System
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering System App
- Engine: 6.6L V8 w/Direct Injection & VVT
- Heavy-Duty 80 Amp Battery
- GVWR: 10,650 lbs
- 2-Speed Active Transfer Case
- 3.42 Axle Ratio
- Engine: Duramax 6.6L Turbo-Diesel V8
- Capped Fuel Fill
- 220 Amps Alternator
- Dual Heavy-Duty 70 Amp Battery
- Exhaust Brake
- Gooseneck/5th Wheel Package
- Tires: LT275/65R20 AT BW
- Spare LT275/70R18 AT BW Tire
Standard Features
- Capped Fuel Fill
- 220 Amps Alternator
- Dual Heavy-Duty 70 Amp Battery
- Winter Grille Cover
- Exhaust Brake
- Engine Block Heater
- 3.42 Axle Ratio
- Transmission: Allison 10-Speed Automatic
- GVWR: 11,350 lbs
- AT4 Preferred Package
- Driver Alert Package I
- Wheels: 20" 6-Spoke Bright Machined Aluminum
- 6" Rectangular Black Tubular Assist Steps
- Universal Home Remote
- Power Sliding Rear Window w/Defogger
- Radio: Premium GMC Infotainment Sys w/Navigation
- Bose Premium 7 Speaker Sound System
- LED Smoked Amber Roof Marker Lamps
- Wireless Charging
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
- Gooseneck/5th Wheel Prep Package
- Bed View Camera
- Spare LT275/70R18 AT BW Tire
- 4G LTE Wi-Fi Hotspot Capable
- GMC Connected Access Capable
- 10-Way Power Driver Seat Adjuster w/Lumbar
- 10-Way Power Passenger Seat Adjuster w/Lumbar
- Driver Memory
- Off-Road Suspension
- Hill Descent Control
- Skid Plates
- 6-Speaker Audio System Feature
- SiriusXM w/360L
- HD Radio
- Radio: AM/FM w/Premium GMC Infotainment System
- Floor-Mounted Center Console
- Compass Located In Instrument Cluster
- 4.2" Diagonal Color Display Driver Info Center
- Electric Rear-Window Defogger
- Power Door Locks
- Remote Vehicle Starter System
- Keyless Open & Start
- 1st & 2nd Rows All-Weather Floor Liners
- OnStar & GMC Connected Services Capable
- 12-Volt Rear Auxiliary Power Outlet
- 120-Volt Instrument Panel Power Outlet
- 120-Volt Bed Mounted Power Outlet
- 2 USB Ports
- 2nd Row Dual USB Charge-Only Ports
- HD Rear Vision Camera
- Heated Driver & Front Outboard Passenger Seats
- Heated & Ventilated Front Bucket Seats
- Heated 2nd Row Outboard Seats
- Steering Wheel Audio Controls
- Manual Tilt-Wheel/Telescoping Steering Column
- Electrical Lock Control Steering Column
- Unauthorized Entry Theft-Deterrent System
- Power Windows w/Driver Express Up/Down
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- Spray-On Pickup Box Bed Liner w/AT4 Logo
- Deep-Tinted Glass
- Painted Black Surround Grille
- LED Cargo Area Lighting
- Red Recovery Hooks
- Rear Wheelhouse Liners
- X31 Off-Road Package
- Integrated Trailer Brake Controller
- ProGrade Trailering System
- Engine: 6.6L V8 w/Direct Injection & VVT
- 2-Speed Active Transfer Case
- Heavy-Duty 80 Amp Battery
- GVWR: 10,650 lbs
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering System App
Included Packages & Options
Engine: Duramax 6.6L Turbo-Diesel V8
- Capped Fuel Fill
- 220 Amps Alternator
- Dual Heavy-Duty 70 Amp BatteryIncludes 730 cold-cranking amps, maintenance-free with rundown protection and retained accessory power.
- Winter Grille Cover
AT4 Premium Package
- AT4 Preferred Package
- Driver Alert Package I
- Wheels: 20" 6-Spoke Bright Machined Aluminum(50.8 cm). Includes high gloss black accents.
- 6" Rectangular Black Tubular Assist StepsDealer-installed.
AT4 Preferred Package
- Universal Home Remote
- Power Sliding Rear Window w/Defogger
- Radio: Premium GMC Infotainment Sys w/NavigationIncludes 8" diagonal color touch-screen, multi-touch display, AM/FM stereo, Bluetooth streaming audio for music and most phones; featuring Android Auto and Apple CarPlay capability for compatible phones, advanced voice recognition, in-vehicle apps, personalized profiles for infotainment and vehicle settings and greater memory.
- Bose Premium 7 Speaker Sound SystemIncludes Richbass woofer.
Driver Alert Package I
- Ultrasonic Front & Rear Park Assist
- Lane Change Alert w/Side Blind Zone Alert
- Rear Cross Traffic Alert
- Perimeter Lighting
Gooseneck/5th Wheel Package
- Gooseneck/5th Wheel Prep PackageHitch platform to accept gooseneck or 5th wheel hitch. Includes hitch platform with tray to accept ball, stamped bed holes with removable caps installed and bed mounted 7-pin trailer harness (similar to UY2 harness).
- Bed View CameraCamera in the CHMSL to show a view of the cargo bed. Includes two trailer camera provisions.
Tires: LT275/65R20 AT BW
- Spare LT275/70R18 AT BW Tire
More manufacturer pre-installed items
- Hitch Package$295Dealer-installed. Includes gooseneck ball and chain tiedown kit with case.
- High Idle Switch$200
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
- Garage door transmitter
- Heated steering wheel
- Illuminated entry
- Memory seat
- Navigation system
- 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: 275/65SR20.0
- Front wheel independent suspension
- Power steering
- Rear tires: 275/65SR20.0
- Single rear wheels
- Speed-sensing steering
- Tires: all-terrain
- Wheel size: 20"
- 1st row LCD monitors: 2
- AM/FM radio: SiriusXM
- Premium audio system: Premium GMC Infotainment System
- Primary LCD size: 8.0"
- Smart device integration: Apple CarPlay/Android Auto
- Speaker type: Bose
- Speakers: 7
- 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
- Block heater
- Compressor: intercooled turbo
- Cylinder configuration: V-8
- Drive type: four-wheel
- Engine liters: 6.6L
- Engine location: front
- Fuel economy fuel type: gasoline
- Fuel tank capacity: 36.0gal.
- Horsepower: 445hp @ 2,800RPM
- Hybrid traction battery type: none
- Manual-shift auto
- Mode select transmission
- Number of valves: 32
- Rear locking differential
- Recommended fuel: Diesel
- Torque: 910 lb.-ft. @ 1,600RPM
- Transmission: 10 speed automatic
- Variable valve control
- Ground clearance (min): 257mm (10.1")
- 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
- Turn signal indicator mirrors
- Compression ratio: 16.00 to 1
- Curb weight: 3,515kg (7,749lbs)
- Engine bore x stroke: 103.0mm x 99.0mm (4.06" x 3.90")
- Engine displacement: 6.6 L
- Engine horsepower: 445hp @ 2,800RPM
- Engine torque: 910 lb.-ft. @ 1,600RPM
- Exterior body width: 2,079mm (81.8")
- Exterior height: 2,023mm (79.7")
- Exterior length: 6,352mm (250.1")
- 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")
- Payload: 1,616kg (3,563lbs)
- Rear headroom: 1,013mm (39.9")
- Rear hiproom: 1,530mm (60.2")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,659mm (65.3")
- Towing capacity: 6,577kg (14,500lbs)
- Turning radius: 8.0m (26.3')
- Wheelbase: 4,037mm (158.9")
- Appearance: analog
- Blind spot: Lane Change Alert with Side Blind Zone Alert warning
- Compass
- Delay-off headlights
- Exterior parking camera cargo
- Front fog lights
- Front reading lights
- Fully automatic headlights
- Low tire pressure warning
- Oil pressure gauge
- Outside temperature display
- Parking sensors: UltraSonic front and rear
- 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
- Rear collision: Rear Cross-Traffic Alert warning
- Security system
- Traction control
KBB.com Consumer Reviews

- 2.0
Transmission trash
By Jason | on Monday, April 07, 2025
Bought a 2023 GMC Duramax diesel Sierra SLT had it for two years hit 50,000 miles. The throttlebody broke went in for service. Got it back three weeks at 62,000 miles now my transmission is slipping. I travel back-and-forth from South Carolina to North Carolina for work daughter’s truck would be my forever truck. What a joke Hundred thousand dollar truck junk… - 5.0
Fantastic truck
By Jjj | on Sunday, November 07, 2021
This one of the most solid vehicles that I have ever driven! The 401 hp engine is more than enough power and the transmission is smooth! Highly recommend this truck!… - 3.0
Don't judge a truck by the appearance
By jmil | on Wednesday, May 11, 2022
Great truck, loved it until the DEF tank heater malfunctioned and shut down the truck. Now sitting waiting for the replacement tank for over 10 weeks. Turns out every HD truck 2020 and 2021 has the same problem and all will need this replacement that is being produced at a snail's pace by GM. Per the dealership, last count, over 9000 trucks like mine are idle waiting for this part. $65000 waste of money and terrible service by GMC (not the local dealership).…
Dealer Notes
10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leather.
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2020 GMC Sierra 2500HD AT4 AT4 4D Crew Cab Summit White 4WD 10-Speed Automatic Duramax 6.6L V8 Turbodiesel
McGee Toyota of Claremont is proud to present you with another True Market Priced Pre-Owned Vehicle. This 2020 GMC Sierra 2500HD AT4 is loaded with the following Factory Options: 10-Speed Automatic, 4WD, and Jet Black With Kalahari Accents Leather AT4 Preferred Package (Bose Premium 7 Speaker Sound System, LED Smoked Amber Roof Marker Lamps, Power Sliding Rear Window w/Defogger, Radio: Premium GMC Infotainment Sys w/Navigation, Universal Home Remote, and Wireless Charging), AT4 Premium Package (Wheels: 20" 6-Spoke Bright Machined Aluminum), Driver Alert Package I (Lane Change Alert w/Side Blind Zone Alert, Rear Cross Traffic Alert, and Ultrasonic Front & Rear Park Assist), Gooseneck/5th Wheel Package, Gooseneck/5th Wheel Prep Package, Hitch Package (LPO), Preferred Equipment Group 4SB (12-Volt Rear Auxiliary Power Outlet, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 2 USB Ports, 2 USB Ports (1st Row), 2-Speed Active Transfer Case, 2nd Row Dual USB Charge-Only Ports, 4.2" Diagonal Color Display Driver Info Center, 4G LTE Wi-Fi Hotspot Capable, Compass Located In Instrument Cluster, Deep-Tinted Glass, Electric Rear-Window Defogger, Electrical Lock Control Steering Column, Floor-Mounted Center Console, GMC Connected Access Capable, HD Rear Vision Camera, Heated & Ventilated Front Bucket Seats, Heated 2nd Row Outboard Seats, Heated Driver & Front Outboard Passenger Seats, Integrated Trailer Brake Controller, Keyless Open & Start, LED Cargo Area Lighting, Manual Tilt-Wheel/Telescoping Steering Column, OnStar & GMC Connected Services Capable, Painted Black Surround Grille, Power Door Locks, Power Front Passenger Windows w/Express Up/Down, Power Rear Windows w/Express Down, Power Windows w/Driver Express Up/Down, Rear Wheelhouse Liners, Remote Vehicle Starter System, Spray-On Pickup Box Bed Liner w/AT4 Logo, Steering Wheel Audio Controls, and Unauthorized Entry Theft-Deterrent System), X31 Off-Road Package (Hill Descent Control), 10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leather, 10-Way Power Driver Seat Adjuster w/Lumbar, 10-Way Power Passenger Seat Adjuster w/Lumbar, 220 Amps Alternator, 4-Wheel Disc Brakes, 6 Speakers, 6-Speaker Audio System Feature, 6" Rectangular Black Tubular Assist Steps (LPO), ABS brakes, Air Conditioning, Alloy wheels, AM/FM radio: SiriusXM, Apple CarPlay/Android Auto, Auto-dimming door mirrors, Auto-dimming Rear-View mirror, Automatic temperature control, Bed View Camera, Brake assist, Bumpers: body-color, Compass, Delay-off headlights, Driver door bin, Driver Memory, Driver vanity mirror, Dual front impact airbags, Dual front side impact airbags, Electronic Stability Control, Engine Block Heater, Exhaust Brake, Front anti-roll bar, Front Bucket Seats, Front Center Armrest, Front dual zone A/C, Front fog lights, Front License Plate Kit, Front reading lights, Front wheel independent suspension, Fully automatic headlights, HD Radio, Heated door mirrors, Heated front seats, Heated rear seats, Heated steering wheel, Heavy-Duty 80 Amp Battery, High Idle Switch, Hitch Guidance w/Hitch View, Illuminated entry, In-Vehicle Trailering System App, Low tire pressure warning, Memory seat, Occupant sensing airbag, Off-Road Suspension, Outside temperature display, Overhead airbag, Overhead console, Panic alarm, Passenger door bin, Passenger vanity mirror, Perforated Leather-Appoint
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While great effort is made to ensure the accuracy of the information on this site, errors do occur so please verify information with a customer service rep. Selling price may vary from the MSRP as each dealer sets the selling price. The selling price does not include sales tax, vehicle registration fees, finance charges, other fees required by law, market adjustments and document preparation fee of $699. Prices are subject to change daily and expire at the close of business the same day. Offers, incentives, and financing are subject to credit approval, offer expiration, and other restrictions. See dealer for qualifications and complete details.
- McGee Price
- $50,106
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- We're here to help: 603-542-5181