2021 GMC Sierra 1500 Denali
- Used
- Diesel
Finance Terms
Buddy Chevrolet
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The overview
- Exterior Color
- Onyx Black
- Interior Color
- JET BLACK, FORGE PERFORATED LEATHER SEAT TRIM
- Odometer
- 54,955 miles
- Fuel Economy
- 15/22 MPG City/Hwy
- Transmission
- Automatic
- Drivetrain
- RWD
- Engine
- Engine: Duramax 3.0L, Turbo-Diesel, Inline 6 Cylinder
- VIN
- 3GTP8FET3MG128764
- Stock Number
- MG128764B
The full specifications
- Max seating capacity: 5
- Fuel System: Direct Injection
- Fuel tank capacity: 22 gal
- Horsepower: 277
Notes from the dealer
Onyx Black 2021 GMC Sierra 1500 Denali RWD 10-Speed Automatic 3.0L I6 **VEHICLE IS A BUYBACK THAT WAS REPAIRED BY MANUFACTURER & UNDER FACTORY WARRANTY, **ALLOW WHEELS **APPLE CARPLAY/ANDROID AUDIO **BLUETOOTH ** BLINDSPOT **LANE DEPARTURE WARNING, **ONSTAR **PUSH BUTTON START ** REMOTE START **USB PORTS, **ALLOY WHEELS, **APPLE CARPLAY/ANDROID AUTO, **BLUETOOTH, **COOLED SEATS, **HEATED SEATING, **LEATHER SEATING, **NAVIGATION, **REAR BACKUP CAMERA, **RUNNING BOARDS, **SIRIUS XM SATELLITE RADIO, **SUNROOF, **VEHICLE REACQUIRED FOR CHECK ENGINE LIGHT IS ON; EXHAUST LEAK; CREAKING/KNOCKING NOISE FROM UNDERNEATH; NOISE WHEN TRAVELING ON UNEVEN PAVEMENT. ISSUES RESOLVED BY MANUFACTURER UNDER WARRANTY., 10-Speed Automatic, Jet Black Leather, 12-Volt Rear Auxiliary Power Outlet, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 170 Amp Alternator, 2 USB Ports, 2 USB Ports (1st Row), 4G LTE Wi-Fi Hotspot Capable, Auto-Locking Rear Differential, Auxiliary External Transmission Oil Cooler, Chrome Recovery Hooks, Chrome Wheel To Wheel Assist Steps, Color-Keyed Carpeting Floor Covering, Compass, Deep-Tinted Glass, Driver Alert Package I, Electric Rear-Window Defogger, Electrical Lock Control Steering Column, Floor-Mounted Center Console, GMC Connected Access Capable, HD Rear Vision Camera, Heated Driver & Front Outboard Passenger Seating, Heavy-Duty Air Filter, Hitch Guidance, Hitch Guidance w/Hitch View, In-Vehicle Trailering App, Integrated Trailer Brake Controller, Keyless Open & Start, Lane Change Alert w/Side Blind Zone Alert, LED Cargo Area Lighting, Manual Tilt-Wheel & Telescoping Steering Column, OnStar & GMC Connected Services Capable, Power Door Locks, Power Front Passenger Windows w/Express Up/Down, Power Front Windows w/Driver Express Up/Down, Power Rear Windows w/Express Down, Power Sliding Rear Window w/Rear Defogger, Preferred Equipment Group 5SA, ProGrade Trailering System, Rear Cross Traffic Alert, Rear Dual USB Charging-Only Ports, Rear Wheelhouse Liners, Remote Vehicle Starter System, Safety Alert Seat, Signature Denali Grille, Spray-On Pickup Bed Liner w/Denali Logo, Steering Wheel Audio Controls, Theft Deterrent System (Unauthorized Entry), Trailering Package, Ultrasonic Front & Rear Park Assist, Universal Home Remote, Ventilated Driver & Front Passenger Seats, Wireless Charging.We are happy to offer nationwide shipping at competitive rates to make your car-buying experience as easy as possible! Driver Alert Package I (Lane Change Alert w/Side Blind Zone Alert, Rear Cross Traffic Alert, and Ultrasonic Front & Rear Park Assist), Preferred Equipment Group 5SA (12-Volt Rear Auxiliary Power Outlet, 120-Volt Bed Mounted Power Outlet, 120-Volt Instrument Panel Power Outlet, 170 Amp Alternator, 2 USB Ports, 2 USB Ports (1st Row), 4G LTE Wi-Fi Hotspot Capable, Auto-Locking Rear Differential, Auxiliary External Transmission Oil Cooler, Chrome Recovery Hooks, Chrome Wheel To Wheel Assist Steps, Color-Keyed Carpeting Floor Covering, Compass, 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 Driver & Front Outboard Passenger Seating, Heavy-Duty Air Filter, Hitch Guidance w/Hitch View, In-Vehicle Trailering App, Integrated Trailer Brake Controller, Keyless Open & Start, LED Cargo Area Lighting, Manual Tilt-Wheel & Telescoping Steering Column, OnStar & GMC Connected Services Capable, Power Door Locks, Power Front Passenger Windows w/Express Up/Down, Power Front Windows w/Driver Express Up/Down, Power Rear Windows w/Express Down, Power Sliding Rear Window w/Rear Defogger, ProGrade Trailering System, Rear Dual USB Charging-Only Ports, Rear Wheelhouse Liners, Remote Vehicle Starter System, Safety Alert Seat, Signature Denali Grille, Spray-On Pickup Bed Liner w/Denali Logo, Steering Wheel Audio Controls, Theft Deterrent System (Unauthorized Entry), Universal Home Remote, V
Track your progress
KBB.com Consumer Reviews
4.0out of 5 overall- 4.0
Depreciation of 50%
by Manny A on 10/28/2026 10:06:36 AM
This is a amazing truck.. Comfortable lots of sensors Etc…. My truck has 30000 miles I when to trade in they offer $46000 I paid $86000 the depreciation is incredible I don’t buy new truck never again. - 5.0
2021 GMC SLT 4WD SIERRA, Great Truck
by Ransom1 on 10/15/2026 4:18:42 PM
This is my 8th truck. This is hands down the very best truck I’ve ever owned. Not only is it the best looking truck on the road I have never had it in the shop except for oil changes and scheduled maintenance. The silver does not show dirt or grime. - 5.0
Great 4 cylinder truck
by Steve on 9/23/2026 2:01:15 AM
I have only pulled a trailer one time and still got 18 mpg down doing 80 down the interstate. Otherwise this vehicle is used for commuting or recreating. I typically get 22-24 mpg driving MT highways to the mountains. The turbo has some spunk for getting up to speed and the five years I've had my truck no complaints.
Quoted price subject to change without notice to correct errors or omissions. New vehicle pricing may already include applicable manufacturer incentives which may expire at any time. Manufacturer incentive data and vehicle features is provided by third parties and believed to be accurate as of the time of publication. Please contact the store by email or phone for details and availability of incentives. Sales tax or other taxes, tag, title, registration fees, and government fees are not included in quoted price. $253 Electronic filing fee and $999 dealer document service fees are included in quoted price. Does not include optional Buddy Care Package, extended warranties, GAP insurance, or other products which may be purchased at the time of sale. All information is gathered from sources that are believed to be reliable, but no assurance can be given that this information is complete and neither Buddy Chevrolet nor its suppliers assume any responsibility for errors or omissions or warrant the accuracy of this information. Displayed MPG is based on applicable EPA mileage ratings. Use for comparison purposes only. Your actual mileage will vary, depending on how you drive and maintain your vehicle, driving conditions, battery pack age/condition (hybrid models only) and other factors. The Manufacturer's Suggested Retail Price excludes tax, title, license, dealer fees and optional equipment. Dealer sets final price.