2020 GMC Sierra 2500HD AT4 Onyx Black 4WD Duramax 6.6L V8 Turbodiesel 10-Speed Automatic
10-Speed Automatic, 4WD, Jet Black With Kalahari Accents Leather.
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We look forward to serving you! 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), Driver Alert Package I (Lane Change Alert w/Side Blind Zone Alert, Rear Cross Traffic Alert, and Ultrasonic Front & Rear Park Assist), Driver Alert Package II (Automatic Emergency Braking, Following Distance Indicator, Forward Collision Alert, IntelliBeam Automatic High Beam On/Off, Lane Departure Warning System, and Safety Alert Seat), Heavy Duty Front Spring/Camper Package, 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), Technology Package (8 Multicolor Driver Instrument Info Display, Bed View Camera, HD Surround Vision w/2 Trailer View Camera Provisions, Multicolor 15 Diagonal Head-Up Display, and Rear Camera Mirror), 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, 5th Wheel & Gooseneck Trailer Wiring Provisions, 6 Speakers, 6-Speaker Audio System Feature, 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, 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, Hitch Guidance w/Hitch View, Illuminated entry, In-Vehicle Trailering System App, Low tire pressure warning, Memory seat, Occupant sensing airbag, Off-Road Assist Steps (LPO), Off-Road Suspension, Outside temperature display, Overhead airbag, Overhead console, Panic alarm, Passenger door bin, Passenger vanity mirror, Perforated Leather-Appointed Front Seat Trim, Pickup Box, Power door mirrors, Power driver seat, Power passenger seat, Power steering, Power wind
Used 2020 GMCSierra 2500 HD AT4 Crew Cab
- Diesel
Final Price Includes Dealer and Handling of $599. Please see Dealer for More Details
- Exterior Color
- Onyx Black
- Interior Color
- JET BLACK WITH KALAHARI ACCENTS, PERFORATED LEATHE
- Odometer
- 134,901 miles
- Transmission
- Automatic
- Drivetrain
- 4WD
- Engine
- Engine: 6.6L V8 DuraMax Diesel, Turbo
- VIN
- 1GT49PEY0LF266411
- Stock Number
- G665841A
GMC
Sierra 2500 HD
Included Packages & Accessories
Detailed Specifications
- Max seating capacity: 5
- Fuel System: Direct Injection
- Fuel tank capacity: 36 gal
- Horsepower: 445
Dealer Notes
KBB.com Consumer Reviews

Overall3.8Out of 5
- 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!…
Based on 13 consumer ratings for 2020–2026 models. | Privacy
- Price
- $44,389
- D & H Fee
- $599
- Final Price
- $44,988
- We're here to help: (303) 416-6935
- We're here to help: (303) 416-6935




