The Trading Post

1950 South Interstate Highway 35, San Marcos, TX 78666
4.3
4.3 out of 5 stars
1view

Used 2021 GMC Sierra 3500HD SLT

155,244 miles
For Sale:$35,995

$1,505(-4%)price drop

Estimated payment:$816/mo.
$0 trade-in, 10% down payment, 48 months, Great credit score

Value ChartA visual chart indicating the fair price range is between $43,000 and $50,400, while the current price is $35,995.$43,000 - $50,400$35,995
  • Priced at $35,995, this vehicle is $7,005 (16%) below the low end of its fair market value of $43,000.

  • The current fair market price range is between $43,000 to $50,400.

  • It has 155,244 miles, which is 91,844 (145%) 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

  • Truck
  • Pickup
  • Crew Cab
  • Heavy Hauler
  • Extended Front Legroom
  • Vaulted Headroom
  • Condition
    Used
  • Mileage
    155,244miles
  • Aggregate Ratings
    3.8
    3.8 out of 5 stars
  • Generation
    4(2020 - 2026)
  • Drivetrain
    4X4
  • Transmission
    6-Speed Shiftable Automatic
  • Exterior Color
    Quicksilver Metallic (Silver)Factory Paint Code:GAN
  • Interior Color
    Dark Walnut Slate (Gray)Factory Paint Code:HVE
  • Upholstery
    Leather
  • Size Segment
    Heavy Duty
  • Doors
    4
  • Max Seating
    6
  • Max Towing Capacity
    21,040lbs.
  • Weight Class
    10,000-14,000 lbs. (3)
  • Bed Length
    98.3in.
  • Ground Clearance
    11.1inch
  • Final Assembly Point
    Flint, Michigan
  • VIN
    1GT49UE74MF293862
  • Starting MSRP
    $57,600

Engine6.6L V8 Gasoline 401hp

  • Fuel Type:Gasoline
  • Fuel Quality:87
  • Max Horsepower:401 hp @ 5200 rpm
  • Power to Weight Ratio:17.62lbs/hp
  • Max Torque:464 ft.lbf @ 4000 rpm
  • Displacement:6.6liters
  • Block Type:V
  • Cylinders:8
  • Aspiration:Naturally Aspirated
  • Fuel Induction:Direct Injection
  • Redline:5,600rpm
  • Oil Capacity:7.6liters
  • Cam Type:OHV
  • Stroke:3.86
  • Bore:4.06
  • Valves:16

Message from the seller

Air Conditioning; Power Windows; Power Locks; Power Steering; Tilt Wheel; AM/FM CD/MP3; Satellite; Immobilizer; Keyless Entry; Alarm; Daytime Running Lights; Dual Airbags Front Head and Side; Active Seatbelts; Passenger Airbag Sensor; Crew Cab; All Wheel ABS; 1 Ton PERFORMANCE & MECHANICAL AUTO LOCKING REAR DIFF 2 SPD AUTOTRAC TRANSFER CASE 170 AMP ALTERNATOR 120V POWER OUTLET IN CARGO BED & INSTRUMENT PANEL STABILITRAK W/ TRAILER SWAY CONTROL & HILL START ASSIST DIG. VARIABLE STEERING ASSIST ALL-TERRAIN TIRES TIRE PRESSURE MONITORING WITH TIRE FILL ALERT BRAKE PAD MONITORING TRAILERING PACKAGE TRAILER BRAKE CONTROLLER CONNECTIVITY & TECHNOLOGY PROGRADE TRAILERING SYSTEM GMC PREMIUM INFOTAINMENT SYSTEM W/8 DIAG. HD COLOR TOUCHSCREEN, VOICE RECOG. BLUETOOTH AUDIO STREAMING WIRELESS APPLE CARPLAY & WIRELESS ANDROID AUTO CAPABLE, IN-VEHICLE APPS AND PERSONALIZATION 4G LTE WI-FI (R) AVAILABLE; SEE ONSTAR.COM FOR TERMS¢ SIRIUSXM RADIO CAPABLE, ALL ACCESS TRIAL W/ SUBSCRIPTION SOLD SEPARATELY DRIVER INFORMATION CENTER KEYLESS OPEN & START REMOTE START REAR SEAT REMINDER INTERIOR DUAL ZONE CLIMATE CONTROL 10 WAY POWER SEATS ADJUSTER INCLUDING LUMBAR 60/40 REAR FOLDING BENCH SEAT WITH STORAGE PACKAGE DRIVER SEAT & MIRROR MEMORY HEATED & LEATHER WRAPPED STEERING WHEEL CARPETED FLOOR MATS

  • Comfort & Seating:

    • Heated Seats
    • Heated Steering Wheel
    • Power Seats
  • Convenience:

    • 115V Power Outlet
    • Automatic Climate Control
    • Remote Start
  • Entertainment:

    • Bluetooth
    • Satellite Radio
  • Exterior:

    • Heated Mirrors
    • Tinted Windows
  • Other:

    • Trailer Hitch
  • Safety:

    • Backup Camera
    • Tire Pressure Monitoring
  • Technology:

    • Android Auto

  • Abs Four Wheel
  • Airbags Front Driver
  • Airbags Front Passenger
  • Airbags Side Impact
  • Airbags Side Curtain
  • Brake Assist
  • Daytime Running Lights
  • Electronic Stability Control
  • Electronic Traction Control
  • Tire Pressure Monitoring System
  • Rollover Stability Control

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 June 18, 2025 (10 months ago)
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