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  • White 2021 GMC Sierra 3500 BaseWhite 2021 GMC Sierra 3500 BaseWhite 2021 GMC Sierra 3500 BaseWhite 2021 GMC Sierra 3500 BaseWhite 2021 GMC Sierra 3500 BaseWhite 2021 GMC Sierra 3500 Base

    $50,509

    48,693 mi.
    Est. $897/mo

    Bartlesville CDJR

    4.7
    Bartlesville, OK (570 mi)
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  • 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

    $52,997

    89,445 mi.
    Est. $941/mo

    ClearShift - Loveland

    4.7
    Loveland, CO (911 mi)
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  • 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

    $64,174

    43,107 mi.
    Est. $1,139/mo

    Mastrovito Hyundai

    4.8
    Yorkville, NY (635 mi)
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  • Summit White 2021 GMC Sierra 3500 AT4Summit White 2021 GMC Sierra 3500 AT4Summit White 2021 GMC Sierra 3500 AT4Summit White 2021 GMC Sierra 3500 AT4Summit White 2021 GMC Sierra 3500 AT4Summit White 2021 GMC Sierra 3500 AT4

    $52,215

    $548
    91,162 mi.
    Est. $927/mo

    O'Daniel CDJR

    4.9
    Fort Wayne, IN (138 mi)
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  • 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

    $64,997

    $1K
    14,243 mi.
    Est. $1,154/mo

    Ingersoll Auto of Danbury

    4.1
    Danbury, CT (734 mi)
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  • Onyx Black 2021 GMC Sierra 3500 AT4Onyx Black 2021 GMC Sierra 3500 AT4Onyx Black 2021 GMC Sierra 3500 AT4Onyx Black 2021 GMC Sierra 3500 AT4Onyx Black 2021 GMC Sierra 3500 AT4Onyx Black 2021 GMC Sierra 3500 AT4

    $52,850

    76,526 mi.
    Est. $938/mo

    Walser Buick GMC Roseville

    4.2
    Roseville, MN (354 mi)
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  • 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

    $51,586

    100,022 mi.
    Est. $916/mo

    Hyundai of Columbia

    4.8
    Columbia, TN (433 mi)
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  • Cayenne Red Tintcoat 2021 GMC Sierra 3500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 3500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 3500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 3500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 3500 AT4Cayenne Red Tintcoat 2021 GMC Sierra 3500 AT4

    $44,198

    $1.1K
    127,633 mi.
    Est. $785/mo

    Ron Marhofer Buick GMC

    4.4
    North Canton, OH (330 mi)
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  • Summit White 2021 GMC Sierra 3500 SLTSummit White 2021 GMC Sierra 3500 SLTSummit White 2021 GMC Sierra 3500 SLTSummit White 2021 GMC Sierra 3500 SLTSummit White 2021 GMC Sierra 3500 SLTSummit White 2021 GMC Sierra 3500 SLT

    $58,255

    $200
    56,993 mi.
    Est. $1,034/mo

    Andy Mohr Chrysler Dodge Jeep RAM

    4.4
    Indianapolis, IN (154 mi)
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  • Summit White 2021 GMC Sierra 3500 AT4Summit White 2021 GMC Sierra 3500 AT4Summit White 2021 GMC Sierra 3500 AT4Summit White 2021 GMC Sierra 3500 AT4Summit White 2021 GMC Sierra 3500 AT4Summit White 2021 GMC Sierra 3500 AT4

    $57,496

    53,113 mi.
    Est. $1,021/mo

    Alpine Buick GMC

    4.4
    Littleton, CO (925 mi)
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  • 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

    $50,647

    $1.7K
    125,924 mi.
    Est. $899/mo

    Loveland Ford Lincoln

    4.3
    Loveland, CO (909 mi)
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  • 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

    $49,990

    118,892 mi.
    Est. $888/mo

    Tameron Hyundai

    4.7
    Birmingham, AL (588 mi)
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  • 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

    $53,997

    83,941 mi.
    Est. $959/mo

    Wilson County GM

    4.1
    Lebanon, TN (400 mi)
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  • 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

    $56,636

    $430
    81,844 mi.
    Est. $1,006/mo

    Tom Bell Chevrolet

    4.3
    Redlands, CA (1,689 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

    $57,490

    62,000 mi.
    Est. $1,021/mo

    Bomnin Chevrolet West Kendall

    4.9
    Miami, FL (1,197 mi)
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  • Summit White 2021 GMC Sierra 3500 SLTSummit White 2021 GMC Sierra 3500 SLTSummit White 2021 GMC Sierra 3500 SLTSummit White 2021 GMC Sierra 3500 SLTSummit White 2021 GMC Sierra 3500 SLTSummit White 2021 GMC Sierra 3500 SLT

    $61,995

    34,159 mi.
    Est. $1,101/mo

    Payless Car Sales - Valley

    4.9
    Wasilla, AK (2,833 mi)
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  • Carbon Black Metallic 2021 GMC Sierra 3500 DenaliCarbon Black Metallic 2021 GMC Sierra 3500 DenaliCarbon Black Metallic 2021 GMC Sierra 3500 DenaliCarbon Black Metallic 2021 GMC Sierra 3500 DenaliCarbon Black Metallic 2021 GMC Sierra 3500 DenaliCarbon Black Metallic 2021 GMC Sierra 3500 Denali

    $46,349

    122,372 mi.
    Est. $823/mo

    Dahl Chevrolet GMC Winona

    4.7
    Winona, MN (253 mi)
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  • Onyx Black 2021 GMC Sierra 3500 AT4Onyx Black 2021 GMC Sierra 3500 AT4Onyx Black 2021 GMC Sierra 3500 AT4Onyx Black 2021 GMC Sierra 3500 AT4Onyx Black 2021 GMC Sierra 3500 AT4Onyx Black 2021 GMC Sierra 3500 AT4

    $57,216

    77,816 mi.
    Est. $1,016/mo

    Cavender Buick GMC West

    4.5
    San Antonio, TX (1,048 mi)
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  • 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

    $57,495

    $1K
    57,897 mi.
    Est. $1,021/mo

    Koons Woodbridge Buick GMC

    4.0
    Woodbridge, VA (591 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

    $46,644

    110,076 mi.
    Est. $828/mo

    Neil Huffman Honda

    4.6
    Clarksville, IN (266 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

    $59,995

    64,885 mi.
    Est. $1,065/mo

    Carsandpickups.com of Dallas

    4.6
    Addison, TX (796 mi)
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  • Summit White 2021 GMC Sierra 3500 SLESummit White 2021 GMC Sierra 3500 SLESummit White 2021 GMC Sierra 3500 SLESummit White 2021 GMC Sierra 3500 SLESummit White 2021 GMC Sierra 3500 SLESummit White 2021 GMC Sierra 3500 SLE

    $43,697

    $300
    82,826 mi.
    Est. $776/mo

    Harry Brown's GM

    4.6
    FARIBAULT, MN (331 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

    $64,385

    $200
    66,068 mi.
    Est. $1,143/mo

    Elk Grove Buick GMC

    4.3
    Elk Grove, CA (1,788 mi)
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  • 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

    $60,893

    $1K
    42,085 mi.
    Est. $1,081/mo

    Rogers GMC of Hermiston

    4.9
    Hermiston, OR (1,590 mi)
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  • White Frost Tri-Coat 2021 GMC Sierra 3500 DenaliWhite Frost Tri-Coat 2021 GMC Sierra 3500 DenaliWhite Frost Tri-Coat 2021 GMC Sierra 3500 DenaliWhite Frost Tri-Coat 2021 GMC Sierra 3500 DenaliWhite Frost Tri-Coat 2021 GMC Sierra 3500 DenaliWhite Frost Tri-Coat 2021 GMC Sierra 3500 Denali

    $65,684

    $1.2K
    24,720 mi.
    Est. $1,166/mo

    Mauer Chevrolet

    4.6
    Inver Grove Heights, MN (344 mi)
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  • 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

    $60,011

    70,513 mi.
    Est. $1,066/mo

    Anderson of Abingdon

    4.7
    Abingdon, MD (616 mi)
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About the 2021 GMC Sierra 3500

Basics

Base shown (base trim).

Seating
2
Door count
2
Drivetrain
Rear-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
FAQs

Is the 2021 GMC Sierra 3500 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.

Is the 2021 GMC Sierra 3500 a good truck?

Below are the Cars.com consumer ratings for the 2021 GMC Sierra 3500.

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

AT4 (2 styles)

Style
4WD Crew Cab 172" AT4 4WD Crew Cab 159" AT4
Inventory price
Starting at $60,500 Starting at $60,300
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)

Base (8 styles)

Style
2WD Double Cab 162" 4WD Double Cab 162" 4WD Crew Cab 172" 4WD Crew Cab 159" 2WD Crew Cab 159" 2WD Crew Cab 172" 4WD Reg Cab 142" 2WD Reg Cab 142"
Inventory price
Starting at $40,200 Starting at $43,000 Starting at $44,800 Starting at $44,600 Starting at $41,800 Starting at $42,000 Starting at $40,200 Starting at $37,400
Combined MPG
0 0 0 0 0 0 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) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)

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)

SLE (8 styles)

Style
4WD Reg Cab 142" SLE 2WD Reg Cab 142" SLE 4WD Crew Cab 159" SLE 4WD Crew Cab 172" SLE 2WD Crew Cab 159" SLE 2WD Crew Cab 172" SLE 2WD Double Cab 162" SLE 4WD Double Cab 162" SLE
Inventory price
Starting at $45,600 Starting at $42,800 Starting at $49,400 Starting at $49,600 Starting at $46,600 Starting at $46,800 Starting at $45,000 Starting at $47,800
Combined MPG
0 0 0 0 0 0 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) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)

SLT (4 styles)

Style
4WD Crew Cab 172" SLT 2WD Crew Cab 159" SLT 2WD Crew Cab 172" SLT 4WD Crew Cab 159" SLT
Inventory price
Starting at $57,600 Starting at $54,600 Starting at $54,800 Starting at $57,400
Combined MPG
0 0 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) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel) 445.0-hp, 6.6-liter, 8 Cylinder Engine (Diesel Fuel)
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