2021 GMC Sierra 3500HD AT4
Specifications, live market data, colors, and factory features.
25 for sale right now
$30,598 – $70,195
Specifications
Performance
- Engine
- 6.6L V-Shaped L5P - DI, DURAMAX, GEN 5 VAR. 1
- Horsepower
- 401 hp
- Torque
- 464 lb-ft
- Transmission
- 6-Speed Automatic
- Drivetrain
- 4WD
Fuel & Efficiency
- Fuel
- Diesel
- MPG City
- 0 mpg
- MPG Highway
- 0 mpg
- Fuel Tank
- 36 gal
Dimensions
- Length
- 266.1″
- Width
- 81.9″
- Height
- 80.9″
- Wheelbase
- 172″
- Curb Weight
- 7,064 lbs
Body & Practicality
- Body Style
- Truck
- Doors
- 4
- Seating
- 5
- Base MSRP
- $59,800
Colors
Factory colors on 2021 GMC Sierra 3500HD AT4s for sale now.
Exterior
- Onyx Black(black)5
- Summit White(white)2
- Ebony Twilight Metallic(black)2
- Pacific Blue Metallic(blue)2
- White2
- Black (Ebony Twilight Metallic)(black)1
Interior
- Jet Black w/Kalahari Accents(black)6
- Jet Black(black)5
- Black/Kalahari(black)1
- Brown1
- Black1
Live Market Data
Computed from active 2021 GMC Sierra 3500HD AT4 listings nationwide, updated continuously.
Price Distribution
Price vs. Mileage
Latest AT4 Listings
The newest 2021 GMC Sierra 3500HD AT4s on the market.
Used 2021 GMC Sierra 3500HD
$70,195
Est. $1,014/mo*
ZAG Motors - Lynnwood
Used 2021 GMC Sierra 3500HD
$45,891
Est. $667/mo*
Rick Hendrick Cadillac Norfolk
Used 2021 GMC Sierra 3500HD
$50,299
Est. $730/mo*
McCoy Auto Sales
Used 2021 GMC Sierra 3500HD
$50,552
Est. $734/mo*
Mt Orab Chrysler Dodge Jeep RAM
Certified 2021 GMC Sierra 3500HD
$44,401
Est. $646/mo*
Hall Buick GMC
Used 2021 GMC Sierra 3500HD
$53,566
Est. $777/mo*
Universal Auto Plaza
Used 2021 GMC Sierra 3500HD
$43,790
Est. $637/mo*
Robin's Truck World
Used 2021 GMC Sierra 3500HD
$51,240
Est. $744/mo*
Lithia Chrysler Dodge Jeep RAM of Portland
What's Yours
Worth?
The median 2021 GMC Sierra 3500HD AT4 lists for $46,456 today.
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GMC Sierra 3500HD AT4
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