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Used 2020 GMCSierra 2500HD AT4
- Exterior Color
- Summit White
- Interior Color
- Jet Black With Kalahari Accents
- Odometer
- 92,857 miles
- Transmission
- 10-Speed Automatic
- Drivetrain
- 4x4
- Engine
- Duramax 6.6L V8 Turbodiesel
- VIN
- 1GT49PEY5LF229418
- Stock Number
- AR45773
Included Packages & Accessories
- 6 Speakers
- AM/FM radio: SiriusXM
- Premium audio system: Premium GMC Infotainment 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
- Pickup Box
- Brake assist
- Electronic Stability Control
- Lane Departure Warning System
- Delay-off headlights
- Front fog lights
- Fully automatic headlights
- Panic alarm
- Security system
- Speed control
- 220 Amps Alternator
- Engine Block Heater
- Exhaust Brake
- Heavy-Duty 80 Amp Battery
- 6" Rectangular Black Tubular Assist Steps (LPO)
- Auto-dimming door mirrors
- Bumpers: body-color
- Front License Plate Kit
- Heated door mirrors
- Power door mirrors
- Rear step bumper
- Turn signal indicator mirrors
- Winter Grille Cover
- 2 USB Ports (1st Row)
- Apple CarPlay/Android Auto
- Auto-dimming Rear-View mirror
- Compass
- 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
- Upfitter Switch Kit (5)
- 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
- 5th Wheel & Gooseneck Trailer Wiring Provisions
- Hitch Guidance w/Hitch View
- In-Vehicle Trailering System App
- Alloy wheels
- Wheels: 18" 6-Spoke Machined Aluminum
- Variably intermittent wipers
- FREE DELIVERY ANYWHERE IN COLORADO
- LIFTED - OVERSIZED WHEELS AND TIRES
- VEHICLE OVERVIEW Year / Model: 2020 GMC Sierra 2500HD Trim: AT4 Cab / Drivetrain: Crew Cab 4WD Engine: Duramax 6.6L Turbo-Diesel V8 Transmission: Allison 10-Speed Automatic Exterior Color: Summit White Interior Color: Jet Black with Kalahari Accents
- STANDARD EQUIPMENT OWNER BENEFITS 3-Year / 36000-Mile Bumper-to-Bumper Limited Warranty 5-Year / 100000-Mile Powertrain Limited Warranty Roadside Assistance & Courtesy Transportation First Maintenance Visit Included
- SAFETY & SECURITY GMC Pro Safety Teen Driver Mode IntelliBeam Automatic High-Beam Headlamps Following Distance Indicator Forward Collision Alert Lane Change Alert with Side Blind Zone Alert Rear Cross Traffic Alert
- PERFORMANCE & MECHANICAL Auto Locking Rear Differential 2-Speed Autotrac Transfer Case Traction Select System with Off-Road & Tow/Haul Modes X31 Off-Road Suspension with Rancho Shocks Skid Plates StabiliTrak with Trailer Sway Control & Hill Start Assist Variable Steering Assist All-Terrain Tires Trailering Package Integrated Trailer Brake Controller 220-Amp Alternator High-Capacity Air Cleaner
- CONNECTIVITY & TECHNOLOGY ProGrade Trailering System OnStar Services & 4G LTE Wi-Fi Capability SiriusXM Radio Capable USB Ports Keyless Open & Start Remote Start Rear Seat Reminder
- INTERIOR Dual-Zone Automatic Climate Control 10-Way Power Front Bucket Seats Heated Front & Rear Outboard Seats Ventilated Front Seats 60/40 Folding Rear Bench Seat with Storage Package Driver Seat & Outside Mirror Memory Heated Leather-Wrapped Steering Wheel AT4 All-Weather Floor Liners
- EXTERIOR CornerStep Rear Bumper Power Side Steps Fixed Cargo Tie-Downs Power-Folding Extending & Heated Trailer Mirrors with Auto-Dimming GMC LED Side Marker Lamps LED Reflector Headlamps LED Fog Lamps LED Cargo Area Lighting Rear-Window Defogger Rear Wheelhouse Liners Red Front Recovery Hooks GMC MultiPro Tailgate Spray-On Bedliner with AT4 Logo
- PACKAGES & OPTIONS (No Pricing Shown) AT4 Premium Package Universal Home Remote Rear Sliding Power Window GMC Premium Infotainment System with Navigation 8" Diagonal HD Color Touchscreen Voice Recognition Bluetooth Audio Streaming Apple CarPlay & Android Auto Personalization Capable Technology Package HD Surround Vision Rear Camera Mirror Bed View Camera Multicolor Head-Up Display Sunroof Power Driver Alert Package II Forward Collision Alert Lane Departure Warning Automatic Emergency Braking
- CHASSIS / AXLE / WHEELS 11350-lb GVWR 3.42 Rear Axle Ratio 20" Machined Aluminum Wheels with Black Accents
- AT4 Preferred Package
- AT4 Premium Package
- Driver Alert Package I
- Driver Alert Package II
- Preferred Equipment Group 4SB
- Technology Package
- X31 Off-Road Package
- 6-Speaker Audio System Feature
- Bose Premium 7 Speaker Sound System
- HD Radio
- Radio: AM/FM w/Premium GMC Infotainment System
- 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 Windows w/Driver Express Up/Down
- Remote Vehicle Starter System
- Universal Home Remote
- Manual Tilt-Wheel/Telescoping Steering Column
- Off-Road Suspension
- Electrical Lock Control Steering Column
- Keyless Open & Start
- Power Door Locks
- Hill Descent Control
- Unauthorized Entry Theft-Deterrent System
- 2-Speed Active Transfer Case
- IntelliBeam Automatic High Beam On/Off
- LED Cargo Area Lighting
- LED Smoked Amber Roof Marker Lamps
- Painted Black Surround Grille
- Rear Wheelhouse Liners
- Spray-On Pickup Box Bed Liner w/AT4 Logo
- 2 USB Ports
- 2nd Row Dual USB Charge-Only Ports
- 4.2" Diagonal Color Display Driver Info Center
- 4G LTE Wi-Fi Hotspot Capable
- 8" Multicolor Driver Instrument Info Display
- Automatic Emergency Braking
- Bed View Camera
- Compass Located In Instrument Cluster
- Floor-Mounted Center Console
- Following Distance Indicator
- Forward Collision Alert
- 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
- Multicolor 15" Diagonal Head-Up Display
- OnStar & GMC Connected Services Capable
- Rear Camera Mirror
- Rear Cross Traffic Alert
- 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 & Ventilated Front Bucket Seats
- Heated 2nd Row Outboard Seats
- Heated Driver & Front Outboard Passenger Seats
- Safety Alert Seat
- Integrated Trailer Brake Controller
- Wheels: 20" 6-Spoke Bright Machined Aluminum
- Deep-Tinted Glass
- Power Front Passenger Windows w/Express Up/Down
- Power Rear Windows w/Express Down
- Power Sliding Rear Window w/Defogger
Detailed Specifications
- 1st and 2nd row curtain head airbags
- 4-wheel ABS Brakes
- ABS and Driveline Traction Control
- Aluminum dash trim
- Aluminum/sim carbon fibre center console trim
- Aluminum/sim carbon fibre door trim
- Anti-theft alarm system
- Audio System Premium Brand : Premium GMC Infotainment System
- Audio controls on steering wheel
- Audio system memory card slot
- Automatic front air conditioning
- Auxilliary engine cooler
- Auxilliary transmission 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
- Dual front air conditioning zones
- Dual illuminated vanity mirrors
- Electrochromatic auto-dimming 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
- Heated driver mirror
- Heated passenger mirror
- Heated steering wheel
- Leather seat upholstery
- Leather/aluminum steering wheel trim
- Machined aluminum rims w/ painted accents
- Memorized Settings for 2 drivers
- Memorized Settings including door mirror(s)
- Passenger Airbag
- Power extendable trailer style exterior mirrors
- Power remote driver mirror adjustment
- Power remote passenger mirror adjustment
- Power retractable mirrors
- Power windows
- Privacy glass: Deep
- Rear seats center armrest
- Remote Engine Start : Keyfob remote start
- Remote activated exterior entry lights
- Remote power door locks
- Remote window operation
- Side airbag
- SiriusXM AM/FM/HD/Satellite Radio
- SiriusXM Satellite Radio(TM)
- Speed-proportional power steering
- Split rear bench
- Stability controll with anti-roll
- Suspension class: Off-road
- Tachometer
- Tilt and telescopic steering wheel
- Tire Pressure Monitoring System: Tire specific
- Total Number of Speakers: 6
- Trailer hitch
- Trip computer
- Turn signal in mirrors
- Urethane shift knob trim
- Video Monitor Location: Front
- Wheel Diameter: 18
- Wheel Width: 8
Standard Features
- AT4 Preferred Package
- Driver Alert Package I
- Wheels: 20" 6-Spoke Bright Machined Aluminum
- HD Surround Vision w/2 Trailer View Camera Provisions
- Rear Camera Mirror
- Bed View Camera
- Multicolor 15" Diagonal Head-Up Display
- 8" Multicolor Driver Instrument Info Display
- 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
- Forward Collision Alert
- Automatic Emergency Braking
- IntelliBeam Automatic High Beam On/Off
- Following Distance Indicator
- Safety Alert Seat
- 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
- 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
- Rear Wheelhouse Liners
- X31 Off-Road Package
- Integrated Trailer Brake Controller
- 2-Speed Active Transfer Case
- 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
Dealer Notes
Recent Arrival at Mike Maroone Ford! CARFAX One-Owner. FREE DELIVERY ANYWHERE IN COLORADO, LIFTED - OVERSIZED WHEELS AND TIRES, VEHICLE OVERVIEW Year / Model: 2020 GMC Sierra 2500HD Trim: AT4 Cab / Drivetrain: Crew Cab 4WD Engine: Duramax 6.6L Turbo-Diesel V8 Transmission: Allison 10-Speed Automatic Exterior Color: Summit White Interior Color: Jet Black with Kalahari Accents, STANDARD EQUIPMENT OWNER BENEFITS 3-Year / 36,000-Mile Bumper-to-Bumper Limited Warranty 5-Year / 100,000-Mile Powertrain Limited Warranty Roadside Assistance & Courtesy Transportation First Maintenance Visit Included, SAFETY & SECURITY GMC Pro Safety Teen Driver Mode IntelliBeam Automatic High-Beam Headlamps Following Distance Indicator Forward Collision Alert Lane Change Alert with Side Blind Zone Alert Rear Cross Traffic Alert, PERFORMANCE & MECHANICAL Auto Locking Rear Differential 2-Speed Autotrac Transfer Case Traction Select System with Off-Road & Tow/Haul Modes X31 Off-Road Suspension with Rancho Shocks Skid Plates StabiliTrak with Trailer Sway Control & Hill Start Assist Variable Steering Assist All-Terrain Tires Trailering Package Integrated Trailer Brake Controller 220-Amp Alternator High-Capacity Air Cleaner, CONNECTIVITY & TECHNOLOGY ProGrade Trailering System OnStar Services & 4G LTE Wi-Fi Capability SiriusXM Radio Capable USB Ports Keyless Open & Start Remote Start Rear Seat Reminder, INTERIOR Dual-Zone Automatic Climate Control 10-Way Power Front Bucket Seats Heated Front & Rear Outboard Seats Ventilated Front Seats 60/40 Folding Rear Bench Seat with Storage Package Driver Seat & Outside Mirror Memory Heated, Leather-Wrapped Steering Wheel AT4 All-Weather Floor Liners, EXTERIOR CornerStep Rear Bumper Power Side Steps Fixed Cargo Tie-Downs Power-Folding, Extending & Heated Trailer Mirrors with Auto-Dimming GMC LED Side Marker Lamps LED Reflector Headlamps LED Fog Lamps LED Cargo Area Lighting Rear-Window Defogger Rear Wheelhouse Liners Red Front Recovery Hooks GMC MultiPro Tailgate Spray-On Bedliner with AT4 Logo, PACKAGES & OPTIONS (No Pricing Shown) AT4 Premium Package Universal Home Remote Rear Sliding Power Window GMC Premium Infotainment System with Navigation 8" Diagonal HD Color Touchscreen Voice Recognition Bluetooth Audio Streaming Apple CarPlay & Android Auto Personalization Capable Technology Package HD Surround Vision Rear Camera Mirror Bed View Camera Multicolor Head-Up Display Sunroof, Power Driver Alert Package II Forward Collision Alert Lane Departure Warning Automatic Emergency Braking, CHASSIS / AXLE / WHEELS 11,350-lb GVWR 3.42 Rear Axle Ratio 20" Machined Aluminum Wheels with Black Accents. Priced below KBB Fair Purchase Price! Summit White 2020 GMC Sierra 2500HD AT4 4D Crew Cab Duramax 6.6L V8 Turbodiesel 10-Speed Automatic 4WD
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 - 3.0
Infotainment system unreliable!
By Brian C on Friday, June 27, 2025
The servicing dealer has been great, the GM engineers not so much! The truck will without warning have no sound for the radio and the blinkers. GM told the dealership to reprogram then when that didn't work they said replace the amplifier and when that didn't work, they said replace a module, and when that didn't work they said to replace the amplifier again, and when that didn't work they said we know it's a known problem but we don't know how to fix it. All of this with less than 9k miles. The dealer has done everything that GM has asked them to do, but none of it works. It's very frustrating to pay this much for a truck and you can't get the radio to stay working. It also got away from the factory with paint damage and a dent in the hood,( the dent is from the inside out on a double wall). I thought I was upgrading when I went from a F250 Lariat to a Denali, but I may have traded one headache for another. - 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!
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