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  • Onyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 Denali

    $50,289

    90,330 mi.
    Est. $947/mo

    Morrie's Onalaska Chevrolet

    4.8
    Onalaska, WI (227 mi)
    Check Availability

  • Onyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 Denali

    $50,289

    90,330 mi.
    Est. $947/mo

    Morrie's Onalaska Chevrolet

    4.8
    Onalaska, WI (227 mi)
    Check Availability

  • Quicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 Denali

    $59,872

    53,752 mi.
    Est. $1,128/mo

    Laura Buick GMC

    4.5
    Collinsville, IL (254 mi)
    Check Availability

  • Quicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 DenaliQuicksilver Metallic 2021 GMC Sierra 3500 Denali

    $57,675

    $300
    48,998 mi.
    Est. $1,087/mo

    Romeo Toyota of Glens Falls

    4.7
    Glens Falls, NY (717 mi)
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  • Summit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 Denali

    $37,489

    176,807 mi.
    Est. $706/mo

    Olathe Dodge Chrysler Jeep RAM

    4.2
    Olathe, KS (428 mi)
    Check Availability
  • Cayenne Red Tintcoat 2021 GMC Sierra 3500 DenaliCayenne Red Tintcoat 2021 GMC Sierra 3500 DenaliCayenne Red Tintcoat 2021 GMC Sierra 3500 DenaliCayenne Red Tintcoat 2021 GMC Sierra 3500 DenaliCayenne Red Tintcoat 2021 GMC Sierra 3500 DenaliCayenne Red Tintcoat 2021 GMC Sierra 3500 Denali

    $63,779

    25,200 mi.
    Est. $1,202/mo

    Green's Toyota of Lexington

    4.7
    Lexington, KY (314 mi)
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  • Onyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 Denali

    $46,455

    134,905 mi.
    Est. $875/mo

    McDavid Ford

    4.6
    Fort Worth, TX (830 mi)
    Check Availability
  • Summit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 Denali

    $57,125

    53,584 mi.
    Est. $1,076/mo

    Group 1 Chevrolet Spring

    4.4
    Houston, TX (927 mi)
    Check Availability
  • Onyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 Denali

    $53,488

    62,000 mi.
    Est. $1,008/mo

    Bomnin Chevrolet West Kendall

    4.9
    Miami, FL (1,197 mi)
    Check Availability

  • Hunter Metallic 2021 GMC Sierra 3500 DenaliHunter Metallic 2021 GMC Sierra 3500 DenaliHunter Metallic 2021 GMC Sierra 3500 DenaliHunter Metallic 2021 GMC Sierra 3500 DenaliHunter Metallic 2021 GMC Sierra 3500 DenaliHunter Metallic 2021 GMC Sierra 3500 Denali

    $66,838

    12,589 mi.
    Est. $1,259/mo

    Alpine Buick GMC

    4.5
    Littleton, CO (925 mi)
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  • Onyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 Denali

    $59,900

    31,176 mi.
    Est. $1,128/mo

    Moore Buick GMC

    4.8
    Jacksonville, NC (741 mi)
    Check Availability
  • Summit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 Denali

    $59,990

    67,294 mi.
    Est. $1,130/mo

    Classic Chevrolet Cadillac of Denison

    4.9
    Denison, TX (744 mi)
    Check Availability
  • Summit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 Denali

    $59,689

    52,602 mi.
    Est. $1,124/mo

    Nissan of Muskogee

    4.9
    Muskogee, OK (593 mi)
    Check Availability
  • Ebony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 Denali

    $49,522

    $1K
    91,808 mi.
    Est. $933/mo

    Bill Dodge GMC Buick

    4.7
    Westbrook, ME (885 mi)
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  • White Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 Denali

    $48,189

    96,153 mi.
    Est. $908/mo

    Corwin Ford of Tri-Cities

    4.5
    Pasco, WA (1,582 mi)
    Check Availability

  • Ebony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 Denali

    $50,932

    $507
    98,814 mi.
    Est. $960/mo

    Tasca Buick GMC Melbourne

    4.8
    Melbourne, FL (1,032 mi)
    Check Availability
  • Black 2021 GMC Sierra 3500 DenaliBlack 2021 GMC Sierra 3500 DenaliBlack 2021 GMC Sierra 3500 DenaliBlack 2021 GMC Sierra 3500 DenaliBlack 2021 GMC Sierra 3500 DenaliBlack 2021 GMC Sierra 3500 Denali

    $58,998

    $2K
    39,440 mi.
    Est. $1,111/mo

    CarMax Tampa

    4.2
    Tampa, FL (997 mi)
    Check Availability
  • Onyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 DenaliOnyx Black 2021 GMC Sierra 3500 Denali

    $49,555

    87,236 mi.
    Est. $934/mo

    Dwayne Lane's Chrysler Dodge Jeep Ram

    4.0
    Everett, WA (1,729 mi)
    Check Availability
  • White Frost 2021 GMC Sierra 3500 DenaliWhite Frost 2021 GMC Sierra 3500 DenaliWhite Frost 2021 GMC Sierra 3500 DenaliWhite Frost 2021 GMC Sierra 3500 DenaliWhite Frost 2021 GMC Sierra 3500 DenaliWhite Frost 2021 GMC Sierra 3500 Denali

    $58,972

    $1.1K
    50,100 mi.
    Est. $1,111/mo

    Kendall Ford of Bend

    4.8
    Bend, OR (1,697 mi)
    Check Availability
  • White Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 DenaliWhite Frost Tricoat 2021 GMC Sierra 3500 Denali

    $58,487

    $1.2K
    51,000 mi.
    Est. $1,102/mo

    Reiselman GMC

    4.9
    Springfield, TN (375 mi)
    Check Availability
  • Summit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 Denali

    $46,668

    131,740 mi.
    Est. $879/mo

    Bozard Ford

    4.9
    St Augustine, FL (896 mi)
    Check Availability

  • Black 2021 GMC Sierra 3500 DenaliBlack 2021 GMC Sierra 3500 DenaliBlack 2021 GMC Sierra 3500 DenaliBlack 2021 GMC Sierra 3500 DenaliBlack 2021 GMC Sierra 3500 DenaliBlack 2021 GMC Sierra 3500 Denali

    $54,896

    59,545 mi.
    Est. $1,034/mo

    CarsNow LLC

    Cleveland, TN (490 mi)
    Check Availability
  • White 2021 GMC Sierra 3500 DenaliWhite 2021 GMC Sierra 3500 DenaliWhite 2021 GMC Sierra 3500 DenaliWhite 2021 GMC Sierra 3500 Denali

    $48,498

    139,038 mi.
    Est. $914/mo

    Tri-City Motors Inc.

    Somerset, KY (370 mi)
    Check Availability
  • Ebony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 Denali

    $57,202

    $2K
    64,907 mi.
    Est. $1,078/mo

    Tom Clark Chevrolet

    Denton, TX (794 mi)
    Check Availability
  • Ebony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 DenaliEbony Twilight Metallic 2021 GMC Sierra 3500 Denali

    $58,395

    90,402 mi.
    Est. $1,100/mo

    Billy Ray Taylor Auto Sales

    Cullman, AL (533 mi)
    Check Availability
  • White Frost 2021 GMC Sierra 3500 DenaliWhite Frost 2021 GMC Sierra 3500 DenaliWhite Frost 2021 GMC Sierra 3500 DenaliWhite Frost 2021 GMC Sierra 3500 DenaliWhite Frost 2021 GMC Sierra 3500 DenaliWhite Frost 2021 GMC Sierra 3500 Denali

    $56,199

    $1.7K
    33,421 mi.
    Est. $1,059/mo

    Imports and Classics

    Bellingham, WA (1,743 mi)
    Check Availability
  • Summit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 Denali

    $59,689

    52,602 mi.
    Est. $1,124/mo

    Nissan of Muskogee

    4.9
    Muskogee, OK (593 mi)
    Check Availability

  • Summit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 DenaliSummit White 2021 GMC Sierra 3500 Denali

    $46,589

    $500
    134,772 mi.
    Est. $878/mo

    Prestige Chrysler Dodge Jeep RAM

    Longmont, CO (916 mi)
    Check Availability
  • Pacific Blue Metallic 2021 GMC Sierra 3500 DenaliPacific Blue Metallic 2021 GMC Sierra 3500 DenaliPacific Blue Metallic 2021 GMC Sierra 3500 DenaliPacific Blue Metallic 2021 GMC Sierra 3500 DenaliPacific Blue Metallic 2021 GMC Sierra 3500 DenaliPacific Blue Metallic 2021 GMC Sierra 3500 Denali

    $57,971

    70,330 mi.
    Est. $1,092/mo

    Always Auto

    Wichita Falls, TX (808 mi)
    Check Availability

GMC Sierra 3500 prices by year

Model year Average price Deals
2026 GMC Sierra 3500 Denali 27 Great deals
2025 GMC Sierra 3500 Denali $76,117 39 Great deals
2024 GMC Sierra 3500 Denali $69,390 65 Great deals
2023 GMC Sierra 3500 Denali $59,733 35 Great deals
2022 GMC Sierra 3500 Denali $57,749 49 Great deals
2020 GMC Sierra 3500 Denali $51,448 12 Great deals
2019 GMC Sierra 3500 Denali $46,026 23 Great deals
2018 GMC Sierra 3500 Denali $46,039 8 Great deals
2017 GMC Sierra 3500 Denali $44,830 9 Great deals

About the 2021 GMC Sierra 3500 Denali

Basics

Denali shown.

Seating
5
Door count
4
Drivetrain
Four Wheel Drive
Combined MPG
0
Transmission
6-Speed A/T
Engine
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
Side view of the 2021 GMC Sierra 3500 Denali
FAQs

How much does the 2021 GMC Sierra 3500 Denali cost?

The 2021 GMC Sierra 3500 Denali price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 3500 Denali is $53,488, with pricing starting at $37,489.

What are some similar vehicles and competitors of the 2021 GMC Sierra 3500 Denali?

The 2021 GMC Sierra 3500 Denali compares to and/or competes against the following vehicles:


Is the 2021 GMC Sierra 3500 Denali reliable?

The 2021 GMC Sierra 3500 has an average reliability rating of 4 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2021 Sierra 3500 owners.

Ratings (2 reviews)

100% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.5
Interior
4.5
Performance
5.0
Value
4.0
Exterior
4.5
Reliability
4.0
Trims

Denali (2 styles)

Style
4WD Crew Cab 159" Denali 4WD Crew Cab 172" Denali
Inventory price
Starting at $66,700 Starting at $66,900
Combined MPG
0 0
Engine
445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)