Central Auto

4315 S STATE ST, Salt Lake City, UT 84107
4
4 out of 5 stars
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Used 2021 GMC Sierra 3500HD SLT

134,989 miles
For Sale:$40,984

$2,900(-6.6%)price drop

Estimated payment:$929/mo.
$0 trade-in, 10% down payment, 48 months, Great credit score

Value ChartA visual chart indicating the fair price range is between $44,800 and $52,600, while the current price is $40,984.$44,800 - $52,600$40,984
  • Priced at $40,984, this vehicle is $3,816 (9%) below the low end of its fair market value of $44,800.

  • The current fair market price range is between $44,800 to $52,600.

  • It has 134,989 miles, which is 71,589 (113%) above the median mileage of 63,400.

Note: This is an estimate based on a variety of factors (experimental feature). It is intended to provide a fair market value range to help guide your buying decision.

View Full Value Report

SequenceDatePrice ChangeCurrent Price
1.1/17/2026 (3 months ago)$41,784
2.1/27/2026 (2 months ago)+$7,000 (+16.8%)$48,784
3.1/30/2026 (2 months ago)-$5,000 (-10.2%)$43,784
4.3/10/2026 (a month ago)-$2,799 (-6.4%)$40,985
5.3/19/2026 (21 days ago)+$2,899 (+7.1%)$43,884
6.3/21/2026 (19 days ago)-$2,900 (-6.6%)$40,984
  • Truck
  • Pickup
  • Crew Cab
  • Extended Front Legroom
  • Condition
    Used
  • Mileage
    134,989miles
  • Aggregate Ratings
    3.8
    3.8 out of 5 stars
  • Generation
    4(2020 - 2026)
  • Drivetrain
    4X4
  • Transmission
    Automatic
  • Exterior Color
    Summit White (White)Factory Paint Code:GAZ
  • Interior Color
    Jet Black (Black)Factory Paint Code:H1Y
  • Size Segment
    Heavy Duty
  • Doors
    4
  • Max Seating
    6
  • Final Assembly Point
    Flint, Michigan
  • VIN
    1GT49UEYXMF299609

Engine6.6L V8 Bio Diesel 445hp

  • Fuel Type:Bio Diesel
  • Max Horsepower:445 hp @ 2800 rpm
  • Max Torque:910 ft.lbf @ 1600 rpm
  • Brand:Duramax
  • Displacement:6.6liters
  • Block Type:V
  • Cylinders:8
  • Aspiration:Turbo
  • Fuel Induction:Common Rail Direct Injection
  • Oil Capacity:9.5liters
  • Cam Type:OHV
  • Stroke:3.9
  • Bore:4.06
  • Valves:32

Message from the seller

Central Auto is pleased to be currently offering this vehicle; here at Central Auto we offer the best prices in town and always work hard to earn your business, we offer great quality vehicles for competitive prices. We are a small dealership with very low overhead so that means we don't have to mark up our prices very high to stay in business and keep our doors open so we pass those savings to the customer. We have plenty of financing options no matter your credit situation First time buyers, bad credit and good credit.O.A.C no down payment required. SE HABLA ESPANOL 399.00

* Based on opinions and should be considered as general guidance only.

  • Reliability (4)
    4 out of 5 stars
    GMC heavy-duty trucks generally have a strong reputation for reliability, and the 2021 Sierra 3500HD SLT is expected to follow suit. The Duramax diesel engine and Allison transmission are proven powertrains. Early indications suggest good long-term durability.
  • Maintenance (3)
    3 out of 5 stars
    Maintenance costs for heavy-duty diesel trucks can be higher than standard vehicles due to specialized fluids and parts. While routine maintenance is straightforward, more complex repairs can be expensive. Fuel economy, while good for its class, contributes to running costs.
  • Technology (4)
    4 out of 5 stars
    The infotainment system is user-friendly with a clear touchscreen and good connectivity options. The available safety features are a welcome addition, though some advanced driver-assist systems are optional. It offers a good balance of modern tech without being overly complicated.
  • Comfort (4)
    4 out of 5 stars
    The interior of the SLT trim is comfortable and well-appointed. The seats are supportive for long drives, and the cabin is relatively quiet, especially for a diesel. Ride quality is good for a heavy-duty truck, absorbing most road imperfections.
  • Dynamics (4)
    4 out of 5 stars
    For a heavy-duty truck, the 2021 GMC Sierra 3500HD SLT handles surprisingly well. The steering is responsive, and it feels stable even when towing heavy loads. It's not a sports car, but for its class, it's quite capable.

  • Seating:

    • Seating Rows:2
    • Standard Seating:6
    • Max Seating:6
    • Leg Room (front):44.5in.
    • Leg Room (rear):43.4in.
  • Fuel Tank:

    • Fuel Tank Volume:36gallon

2021 GMC Sierra 3500HD

The 2021 GMC Sierra 3500HD stands as a formidable contender in the heavy-duty pickup truck segment, engineered for those who demand uncompromising capability and robust performance. Whether it's towing substantial trailers, hauling heavy payloads, or tackling demanding work sites, the Sierra 3500HD is built to excel. This overview delves into its key features, ownership experience, potential considerations, and overall value.

Highlights

  • Powertrain Prowess: The Sierra 3500HD offers two potent engine options to suit your hauling and towing needs.
    • 6.6L V8 Gas Engine: This gasoline powerhouse delivers ample muscle for everyday tasks and lighter heavy-duty applications.
    • Duramax 6.6L Turbo-Diesel V8 Engine: The star of the show, this diesel engine is renowned for its incredible torque, enabling the Sierra 3500HD to achieve its maximum towing and payload capacities. It's the go-to for the most demanding jobs.
  • Advanced Safety Features: GMC equips the Sierra 3500HD with a suite of advanced driver-assistance systems designed to enhance safety and confidence.
    • Forward Collision Alert: Warns of an imminent frontal collision, providing audible and visual alerts.
    • Automatic Emergency Braking: Can automatically apply brakes to help reduce the severity of a frontal collision or avoid it altogether.
    • Lane Departure Warning: Alerts the driver if the vehicle begins to drift out of its lane without the turn signal activated.
    • Blind Spot Monitoring with Trailer Blind Spot Monitoring: Detects vehicles in your blind spots and can also extend monitoring to your trailer, providing crucial alerts when changing lanes.
    • Rear Cross Traffic Alert: Warns of approaching traffic when you're backing out of a parking space or driveway.
    • Hitch Guidance with Hitch View: Provides a dynamic centerline guide on the screen to help you align your trailer for hitching, with a special camera view of the hitch area.
  • Trim Level Summary: The Sierra 3500HD is available in a range of trims, each offering a distinct blend of features and refinement.
    • Pro: The no-nonsense, work-oriented trim, focusing on essential functionality and durability.
    • SLE: Steps up with more creature comforts and technology, making it suitable for both work and everyday use.
    • SLT: Offers a more premium experience with enhanced interior appointments and advanced features.
    • AT4: The off-road oriented trim, featuring unique styling, lifted suspension, and off-road enhancements for tackling challenging terrain.
    • Denali: The pinnacle of luxury and technology, providing an upscale interior, premium materials, and the most advanced features available.
  • Innovative Towing Technology: Beyond the safety features, the Sierra 3500HD boasts several technologies specifically designed to simplify and improve the towing experience. This includes multiple camera views (including a transparent trailer view on select trims) and integrated trailer brake controllers.

What to Expect

Owning a 2021 GMC Sierra 3500HD is an experience characterized by capability and a certain rugged elegance. For daily driving, expect a commanding presence on the road and a comfortable, albeit truck-like, ride. The powerful engines, especially the Duramax diesel, provide effortless acceleration even when heavily loaded. Maintenance will likely involve regular oil changes, tire rotations, and fluid checks, with diesel-specific maintenance like fuel filter replacements being more frequent. Insurance costs can be higher than for lighter vehicles due to the truck's size, power, and repair costs. Resale value for well-maintained heavy-duty trucks like the Sierra 3500HD is generally strong, reflecting their enduring utility.

Potential Considerations

While the Sierra 3500HD is a highly capable machine, buyers should be aware of a few potential considerations. Its sheer size can make maneuverability in tight urban environments or parking garages challenging. Fuel economy, particularly with the gasoline engine or when towing, will be significantly lower than for smaller vehicles. The ride, while improved, can still be a bit firm when the truck is unloaded, as it's designed to handle heavy payloads. Some advanced features, while beneficial, can add complexity to the vehicle.

Overall Summary

The 2021 GMC Sierra 3500HD is a supremely capable and highly versatile heavy-duty pickup truck. It excels in its primary mission of towing and hauling, offering potent engine choices and an impressive array of technology to aid in these tasks. With its well-appointed interior options, especially on higher trims, it also offers a comfortable and refined experience for its segment. While its size and fuel consumption require consideration, for those who need to tackle the toughest jobs, the Sierra 3500HD is a compelling and reliable choice.

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Listed on January 17, 2026 (3 months ago)
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