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  • Brownstone Metallic 2021 GMC Sierra 2500 SLTBrownstone Metallic 2021 GMC Sierra 2500 SLTBrownstone Metallic 2021 GMC Sierra 2500 SLTBrownstone Metallic 2021 GMC Sierra 2500 SLTBrownstone Metallic 2021 GMC Sierra 2500 SLTBrownstone Metallic 2021 GMC Sierra 2500 SLT

    $40,984

    120,424 mi.
    Est. $770/mo

    Serra Ford Rochester Hills

    4.9
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    Rochester Hills, MI (237 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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  • 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

    $49,900

    81,398 mi.
    Est. $938/mo

    Bob Howard Chevrolet

    4.5
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    Oklahoma City, OK (686 mi)
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  • Cayenne Red Tintcoat 2021 GMC Sierra 2500 SLTCayenne Red Tintcoat 2021 GMC Sierra 2500 SLTCayenne Red Tintcoat 2021 GMC Sierra 2500 SLTCayenne Red Tintcoat 2021 GMC Sierra 2500 SLTCayenne Red Tintcoat 2021 GMC Sierra 2500 SLTCayenne Red Tintcoat 2021 GMC Sierra 2500 SLT

    $54,928

    49,869 mi.
    Est. $1,032/mo

    Jim Norton Toyota

    4.7
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    Tulsa, OK (600 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 SLT

    $50,991

    71,049 mi.
    Est. $958/mo

    Lexus of Jacksonville

    4.8
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    Jacksonville, FL (868 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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  • 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

    $53,558

    $440
    74,199 mi.
    Est. $1,007/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

    $45,000

    71,019 mi.
    Est. $846/mo

    Subaru of Naples

    4.7
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    Naples, FL (1,134 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

    $45,480

    77,308 mi.
    Est. $855/mo

    Banner Coulson Chevrolet

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    Higginsville, MO (379 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

    $46,834

    $909
    60,228 mi.
    Est. $880/mo

    Deery Brothers - Buick Chevrolet GMC Mazda Nissan Toyota

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    West Burlington, IA (198 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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  • 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

    $46,142

    114,867 mi.
    Est. $867/mo

    Chevrolet Buick GMC of Millersburg

    4.5
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    Millersburg, OH (313 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

    69,452 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

    $45,584

    $3.1K
    42,710 mi.
    Est. $857/mo

    Surprise Ford

    4.4
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    Surprise, AZ (1,464 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

    $62,898

    $300
    31,854 mi.
    Est. $1,182/mo

    Dave Smith Coeur d'Alene

    3.6
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    Coeur d'Alene, ID (1,475 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

    $44,980

    $2.5K
    88,582 mi.
    Est. $845/mo

    Banner Coulson Chevrolet

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    Higginsville, MO (379 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

    $48,595

    $1K
    63,590 mi.
    Est. $913/mo

    Mid-Towne Auto Center

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    Franklin, OH (239 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

    $52,849

    $500
    62,065 mi.
    Est. $993/mo

    Tom Kadlec Honda

    4.7
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    Rochester, MN (288 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

    $44,229

    87,589 mi.
    Est. $831/mo

    Romeo Chevrolet Buick GMC

    4.3
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    Lake Katrine, NY (701 mi)
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  • Blue 2021 GMC Sierra 2500 SLTBlue 2021 GMC Sierra 2500 SLTBlue 2021 GMC Sierra 2500 SLTBlue 2021 GMC Sierra 2500 SLTBlue 2021 GMC Sierra 2500 SLTBlue 2021 GMC Sierra 2500 SLT

    $41,200

    $775
    97,218 mi.
    Est. $774/mo

    Callahan Motor Company

    3.3
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    Keller, TX (813 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

    $42,670

    114,186 mi.
    Est. $802/mo

    Boardwalk Motor Cars

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    Walker, LA (809 mi)
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GMC Sierra 2500 prices by year

Model year Average price Deals
2026 GMC Sierra 2500 SLT 1 Good deal
2025 GMC Sierra 2500 SLT $68,607 10 Great deals
2024 GMC Sierra 2500 SLT $62,825 75 Good deals
2023 GMC Sierra 2500 SLT $55,714 9 Great deals
2022 GMC Sierra 2500 SLT $49,288 14 Great deals
2020 GMC Sierra 2500 SLT $43,457 6 Great deals
2019 GMC Sierra 2500 SLT $40,386 25 Good deals
2018 GMC Sierra 2500 SLT $38,940 23 Good deals
2017 GMC Sierra 2500 SLT $35,762 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 $48,066, with pricing starting at $39,997.

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