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  • Quicksilver Metallic 2021 GMC Sierra 2500 SLTQuicksilver Metallic 2021 GMC Sierra 2500 SLTQuicksilver Metallic 2021 GMC Sierra 2500 SLTQuicksilver Metallic 2021 GMC Sierra 2500 SLTQuicksilver Metallic 2021 GMC Sierra 2500 SLTQuicksilver Metallic 2021 GMC Sierra 2500 SLT

    $47,500

    $1.4K
    74,784 mi.
    Est. $893/mo

    Ron Marhofer Buick GMC

    4.3
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    North Canton, OH (330 mi)

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  • Summit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLT

    $44,985

    $3.7K
    42,710 mi.
    Est. $846/mo

    Surprise Ford

    4.4
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    Surprise, AZ (1,464 mi)
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  • Summit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLT

    $49,747

    $153
    81,398 mi.
    Est. $935/mo

    Bob Howard Chevrolet

    4.5
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    Oklahoma City, OK (686 mi)
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  • Ebony Twilight Metallic 2021 GMC Sierra 2500 SLTEbony Twilight Metallic 2021 GMC Sierra 2500 SLTEbony Twilight Metallic 2021 GMC Sierra 2500 SLTEbony Twilight Metallic 2021 GMC Sierra 2500 SLTEbony Twilight Metallic 2021 GMC Sierra 2500 SLTEbony Twilight Metallic 2021 GMC Sierra 2500 SLT

    $50,991

    71,056 mi.
    Est. $958/mo

    Lexus of Jacksonville

    4.8
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    Jacksonville, FL (868 mi)
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  • Cardinal Red 2021 GMC Sierra 2500 SLTCardinal Red 2021 GMC Sierra 2500 SLTCardinal Red 2021 GMC Sierra 2500 SLTCardinal Red 2021 GMC Sierra 2500 SLTCardinal Red 2021 GMC Sierra 2500 SLTCardinal Red 2021 GMC Sierra 2500 SLT

    $53,303

    $255
    74,199 mi.
    Est. $1,002/mo

    Don Ledford Automotive

    4.6
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    Cleveland, TN (486 mi)
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  • Summit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLT

    $51,995

    69,500 mi.
    Est. $977/mo

    Casa Buick GMC

    4.6
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    El Paso, TX (1,246 mi)
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  • Summit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLT

    $54,131

    $583
    55,519 mi.
    Est. $1,017/mo

    Mountain View Chevrolet

    4.0
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    Upland, CA (1,711 mi)
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  • Summit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLT

    $43,500

    $2K
    102,749 mi.
    Est. $818/mo

    Silo Auto Sales

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    Gilbert, AZ (1,442 mi)
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  • Cardinal Red 2021 GMC Sierra 2500 SLTCardinal Red 2021 GMC Sierra 2500 SLTCardinal Red 2021 GMC Sierra 2500 SLTCardinal Red 2021 GMC Sierra 2500 SLTCardinal Red 2021 GMC Sierra 2500 SLTCardinal Red 2021 GMC Sierra 2500 SLT

    $46,456

    60,228 mi.
    Est. $873/mo

    Deery Brothers - Buick Chevrolet GMC Mazda Nissan Toyota

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    West Burlington, IA (198 mi)
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  • Quicksilver Metallic 2021 GMC Sierra 2500 SLTQuicksilver Metallic 2021 GMC Sierra 2500 SLTQuicksilver Metallic 2021 GMC Sierra 2500 SLTQuicksilver Metallic 2021 GMC Sierra 2500 SLTQuicksilver Metallic 2021 GMC Sierra 2500 SLTQuicksilver Metallic 2021 GMC Sierra 2500 SLT

    $39,995

    $2K
    91,245 mi.
    Est. $752/mo

    Charbonneau Car Center

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    Dickinson, ND (823 mi)
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  • Summit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLT

    $55,395

    12,073 mi.
    Est. $1,041/mo

    Elko Motor Company

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    Elko, NV (1,453 mi)
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  • White 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLT

    $48,395

    $1.2K
    63,590 mi.
    Est. $910/mo

    Mid-Towne Auto Center

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    Franklin, OH (239 mi)
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  • White 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLT

    $39,997

    163,798 mi.
    Est. $752/mo

    Collierville Auto Center

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    Collierville, TN (486 mi)
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  • Summit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLT

    $43,749

    $246
    101,472 mi.
    Est. $822/mo

    Feldman Chevrolet of Highland

    3.7
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    Highland, MI (210 mi)
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  • Pacific Blue Metallic 2021 GMC Sierra 2500 SLTPacific Blue Metallic 2021 GMC Sierra 2500 SLTPacific Blue Metallic 2021 GMC Sierra 2500 SLTPacific Blue Metallic 2021 GMC Sierra 2500 SLTPacific Blue Metallic 2021 GMC Sierra 2500 SLTPacific Blue Metallic 2021 GMC Sierra 2500 SLT

    $44,134

    $2K
    114,867 mi.
    Est. $830/mo

    Chevrolet Buick GMC of Millersburg

    4.5
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    Millersburg, OH (313 mi)
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  • Onyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLT

    $40,191

    108,650 mi.
    Est. $755/mo

    Tom Kadlec Chevrolet

    4.2
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    North Branch, MN (367 mi)
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  • Summit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLT

    $43,980

    122,992 mi.
    Est. $827/mo

    Taylor Grubaugh Chevrolet, LLC

    4.2
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    Waynesville, MO (373 mi)
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  • White 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLT

    $51,560

    35,274 mi.
    Est. $969/mo

    Nucar Volkswagen of Norwood

    4.4
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    Norwood, MA (843 mi)
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  • Onyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLT

    $54,349

    62,065 mi.
    Est. $1,022/mo

    Tom Kadlec Honda

    4.7
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    Rochester, MN (288 mi)
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  • Onyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLTOnyx Black 2021 GMC Sierra 2500 SLT

    $46,995

    $1K
    93,899 mi.
    Est. $883/mo

    Laura Buick GMC

    4.6
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    Collinsville, IL (254 mi)
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  • White 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLTWhite 2021 GMC Sierra 2500 SLT

    $43,779

    $450
    87,589 mi.
    Est. $823/mo

    Romeo Chevrolet Buick GMC

    4.3
    Check Availability
    Lake Katrine, NY (701 mi)
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  • Summit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLTSummit White 2021 GMC Sierra 2500 SLT

    $52,995

    56,310 mi.
    Est. $996/mo

    Robert Brogden's Hays GMC

    4.7
    Check Availability
    Hays, KS (649 mi)
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GMC Sierra 2500 prices by year

Model year Average price Deals
2026 GMC Sierra 2500 SLT 2 Good deals
2025 GMC Sierra 2500 SLT $68,695 13 Great deals
2024 GMC Sierra 2500 SLT $62,729 82 Good deals
2023 GMC Sierra 2500 SLT $54,376 8 Great deals
2022 GMC Sierra 2500 SLT $49,894 11 Great deals
2020 GMC Sierra 2500 SLT $44,112 17 Good deals
2019 GMC Sierra 2500 SLT $40,361 5 Great deals
2018 GMC Sierra 2500 SLT $38,129 24 Good deals
2017 GMC Sierra 2500 SLT $35,740 21 Good deals

About the 2021 GMC Sierra 2500 SLT

Basics

SLT shown.

Seating
5
Door count
4
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 2500 SLT
FAQs

How much does the 2021 GMC Sierra 2500 SLT cost?

The 2021 GMC Sierra 2500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2021 Sierra 2500 SLT is $47,434, with pricing starting at $33,988.

What are some similar vehicles and competitors of the 2021 GMC Sierra 2500 SLT?

The 2021 GMC Sierra 2500 SLT compares to and/or competes against the following vehicles:


Is the 2021 GMC Sierra 2500 SLT reliable?

The 2021 GMC Sierra 2500 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 2500 owners.

Ratings (29 reviews)

75% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.7
Interior
4.6
Performance
4.3
Value
3.9
Exterior
4.6
Reliability
4.0
Trims

SLT (8 styles)

Style
4WD Double Cab 162" SLT 2WD Double Cab 149" SLT 2WD Double Cab 162" SLT 4WD Double Cab 149" SLT 4WD Crew Cab 159" SLT 2WD Crew Cab 159" SLT 2WD Crew Cab 172" SLT 4WD Crew Cab 172" SLT
Inventory price
Starting at $54,600 Starting at $51,600 Starting at $51,800 Starting at $54,400 Starting at $56,200 Starting at $53,400 Starting at $53,600 Starting at $56,400
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)
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GMC Sierra 2500 trims