2021 GMC Sierra 3500HD Base
- Used
- Diesel
The highlights
- Premium audio system
- Wireless phone connectivity
- Split folding rear seat
- Fully automatic headlights
- Dual rear wheels
- Trailer sway control
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The full specifications
- 1-touch down
- 1-touch up
- Air conditioning
- Driver door bin
- Front beverage holders
- Overhead console
- Passenger door bin
- Passenger vanity mirror
- Power windows
- Rear door bins
- Tilt steering wheel
- Dual rear wheels
- Front anti-roll bar
- Front tires: 235/80SR17.0E
- Front wheel independent suspension
- Power steering
- Rear tires: 235/80SR17.0E
- Wheel size: 17"
- 1st row LCD monitors: 1
- Premium audio system: GMC Infotainment System
- Primary LCD size: 7.0"
- Smart device integration: Apple CarPlay/Android Auto
- Speakers: 6
- Wireless phone connectivity: Bluetooth
- Front center armrest: w/storage
- Rear seats: split-bench
- Rear seats Folding position: fold-up cushion
- Split folding rear seat
- Cylinder configuration: V-8
- Drive type: four-wheel
- Engine liters: 6.6L
- Engine location: front
- Hybrid traction battery type: none
- Mode select transmission
- Rear locking differential
- Standard fuel economy fuel type: gasoline
- Variable valve control
- Ground clearance (min): 207mm (8.2")
- Bumpers: chrome
- Left rear passenger door: conventional
- Right rear passenger: conventional
- Trailer sway control
- Exterior body width: 2,053mm (80.8")
- Exterior height: 2,035mm (80.1")
- Exterior length: 6,866mm (270.3")
- Front headroom: 1,093mm (43.0")
- Front hiproom: 1,549mm (61.0")
- Front legroom: 1,131mm (44.5")
- Front shoulder room: 1,677mm (66.0")
- GVWR: 6,350kg (14,000lbs)
- Rear headroom: 1,019mm (40.1")
- Rear hiproom: 1,549mm (61.0")
- Rear legroom: 1,102mm (43.4")
- Rear shoulder room: 1,659mm (65.3")
- Turning radius: 8.8m (28.7')
- Wheelbase: 4,490mm (176.8")
- Appearance: analog
- Delay-off headlights
- Front reading lights
- Fully automatic headlights
- Low tire pressure warning
- Outside temperature display
- Rear reading lights
- 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
- Traction control
Notes from the dealer
Highlighted features of this well-equipped Sierra 3500HD include:
- Duramax 6.6L V8 Turbodiesel engine with 445 hp and 910 lb-ft of torque
- Integrated trailer brake controller
- Snow plow prep package with increased front GAWR and skid plates
- Upfitter switch kit with 5 configurable circuits for aftermarket accessories
- Convenience package with remote keyless entry, tinted glass, rear window defogger, and more
This Sierra 3500HD also comes equipped with a host of advanced technology features, including the GMC Infotainment System with SiriusXM Radio, a 120-volt power outlet, and OnStar and GMC Connected Services capabilities. The rear camera kit and power-adjustable trailering mirrors make maneuvering and towing a breeze.
Whether you're tackling tough jobs on the jobsite or embarking on your next adventure, the 2021 GMC Sierra 3500HD Base is the capable and versatile heavy-duty truck you can rely on. Its robust construction, powerful drivetrain, and thoughtful features make it the ideal choice for those who demand the best.
Experience the uncompromising performance and rugged capability of the 2021 GMC Sierra 3500HD Base for yourself. We invite you to visit our showroom and take this impressive truck for a test drive. Our knowledgeable sales team is here to answer any questions you may have and help you find the perfect Sierra 3500HD to meet your needs. Let's get you behind the wheel of this exceptional heavy-duty truck today.
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Peace of mind
Vehicle history report
- Title information
- Odometer readings
- Accident data (if applicable)
- Service history
- Vehicle usage
- Recall information (if applicable)
- Warranty status
Optional add-on protection
- GAP Protection
- Lifetime Powertrain
- Tires and Wheels
- Paint Protection
A name you can trust
KBB.com Consumer Reviews
- 5.0
2020 GMC Denali 3500 HD Duramax is a BEAST!
by Merlinsmerc on Friday, January 22, 2021
Pulling a conventional 10,000 lb trailer over mountain passes is a whole new experience. Staying at the speed limit up long steep grades did not change the engine temperature. I feathered the accelerator up the mountain. The new 10 speed transmission is so smooth you cant feel it changing gears. This is my second GMC Denali Duramax, first being a 2016. I debated trading in for over a year, and am so happy I made the trade. Trailers always exceed by far the tongue weight posted on them, and in my case it came in at 1450 lbs. That exceeded my trucks posted maximum. The 2020 dually posts a 2,000 lb tongue weight, so now I can front load the trailer, and that reduces sway. If you can afford it, and have a heavy trailer, buy the truck! - 5.0
Love our truck
by Ron on Friday, December 11, 2020
The truck doesn’t have a sun roof which it was suppose to have - 2.0
In shop for 13 weeks so far!
by Whip on Monday, September 09, 2024
My truck has been in the shop for 13 weeks to this point with no end in sight. The Infotainment panel blew out which controls pretty much everything. Nice truck except if something goes wrong then, good luck! I would recommend looking at Fords and Rams and ask the question, how many vehicles do you have in your shop waiting for parts and for how long. I heard of one at my GMC dealership that has been waiting for 8 months! Only thing I get from GM is "we understand your frustration". Apparently they don't, or I would have my truck back long ago.
* The advertised price does not include sales tax, vehicle registration fees, other fees required by law, finance charges and any documentation charges.
* Images, prices, and options shown, including vehicle color, trim, options, pricing and other specifications are subject to availability, incentive offerings, current pricing and credit worthiness.
All prices do not include dealer processing fee of $757. Tax, title, and license fees are extra. All finance offers require lender approval. Some offers require financing through Chrysler Capital Financial and are not cash sale offers.


