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  • Quicksilver Metallic 2020 GMC Sierra 2500 SLTQuicksilver Metallic 2020 GMC Sierra 2500 SLTQuicksilver Metallic 2020 GMC Sierra 2500 SLTQuicksilver Metallic 2020 GMC Sierra 2500 SLTQuicksilver Metallic 2020 GMC Sierra 2500 SLTQuicksilver Metallic 2020 GMC Sierra 2500 SLT

    $32,026

    142,605 mi.
    Est. $569/mo

    Circle Buick GMC

    4.1
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    Highland, IN (26 mi)

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  • Onyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLT

    $43,952

    84,178 mi.
    Est. $780/mo

    Morrie's Sparta Chevrolet

    4.6
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    Sparta, WI (215 mi)

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  • Summit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLT

    $44,129

    91,821 mi.
    Est. $784/mo

    Panama City Toyota

    4.7
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    Panama City, FL (817 mi)
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  • Onyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLT

    $46,497

    90,765 mi.
    Est. $826/mo

    Murray Ford of Kingsland

    4.7
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    Kingsland, GA (837 mi)
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  • Quicksilver Metallic 2020 GMC Sierra 2500 SLTQuicksilver Metallic 2020 GMC Sierra 2500 SLTQuicksilver Metallic 2020 GMC Sierra 2500 SLTQuicksilver Metallic 2020 GMC Sierra 2500 SLTQuicksilver Metallic 2020 GMC Sierra 2500 SLTQuicksilver Metallic 2020 GMC Sierra 2500 SLT

    $44,397

    68,626 mi.
    Est. $788/mo

    Pat McGrath Chevyland

    4.4
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    Cedar Rapids, IA (208 mi)
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  • Brownstone Metallic 2020 GMC Sierra 2500 SLTBrownstone Metallic 2020 GMC Sierra 2500 SLTBrownstone Metallic 2020 GMC Sierra 2500 SLTBrownstone Metallic 2020 GMC Sierra 2500 SLT

    $34,990

    154,703 mi.
    Est. $621/mo

    David Scott Lee Chevrolet GMC

    4.7
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    Troy, AL (700 mi)
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  • Pacific Blue Metallic 2020 GMC Sierra 2500 SLTPacific Blue Metallic 2020 GMC Sierra 2500 SLTPacific Blue Metallic 2020 GMC Sierra 2500 SLTPacific Blue Metallic 2020 GMC Sierra 2500 SLTPacific Blue Metallic 2020 GMC Sierra 2500 SLTPacific Blue Metallic 2020 GMC Sierra 2500 SLT

    $55,372

    31,080 mi.
    Est. $983/mo

    Napleton Buick GMC

    4.7
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    Crystal Lake, IL (43 mi)
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  • Cardinal Red 2020 GMC Sierra 2500 SLTCardinal Red 2020 GMC Sierra 2500 SLTCardinal Red 2020 GMC Sierra 2500 SLTCardinal Red 2020 GMC Sierra 2500 SLTCardinal Red 2020 GMC Sierra 2500 SLTCardinal Red 2020 GMC Sierra 2500 SLT

    $45,371

    $740
    60,960 mi.
    Est. $806/mo

    Vic Canever Chevrolet

    4.4
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    Fenton, MI (210 mi)

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  • Onyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLT

    $53,408

    11,342 mi.
    Est. $948/mo

    Marquardt of Barrington GMC

    4.8
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    Barrington, IL (31 mi)
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  • Onyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLT

    $49,780

    76,518 mi.
    Est. $884/mo

    BidCars Boston

    4.9
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    Walpole, MA (842 mi)
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  • Carbon Black Metallic 2020 GMC Sierra 2500 SLTCarbon Black Metallic 2020 GMC Sierra 2500 SLTCarbon Black Metallic 2020 GMC Sierra 2500 SLTCarbon Black Metallic 2020 GMC Sierra 2500 SLTCarbon Black Metallic 2020 GMC Sierra 2500 SLTCarbon Black Metallic 2020 GMC Sierra 2500 SLT

    $43,846

    117,836 mi.
    Est. $779/mo

    McLarty Daniel Chevrolet

    4.8
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    Springdale, AR (527 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLT

    $45,411

    $487
    79,311 mi.
    Est. $806/mo

    Kerns Chevrolet GMC

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    Celina, OH (185 mi)
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  • White Frost Tricoat 2020 GMC Sierra 2500 SLTWhite Frost Tricoat 2020 GMC Sierra 2500 SLTWhite Frost Tricoat 2020 GMC Sierra 2500 SLTWhite Frost Tricoat 2020 GMC Sierra 2500 SLTWhite Frost Tricoat 2020 GMC Sierra 2500 SLTWhite Frost Tricoat 2020 GMC Sierra 2500 SLT

    $35,599

    $1.7K
    134,645 mi.
    Est. $632/mo

    Pinckney Chrysler Dodge Jeep Ram

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    Pinckney, MI (195 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLT

    $51,615

    55,961 mi.
    Est. $916/mo

    Laura Chevrolet Buick GMC of Sullivan, LLC

    4.8
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    Sullivan, MO (311 mi)

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  • White 2020 GMC Sierra 2500 SLTWhite 2020 GMC Sierra 2500 SLTWhite 2020 GMC Sierra 2500 SLTWhite 2020 GMC Sierra 2500 SLTWhite 2020 GMC Sierra 2500 SLTWhite 2020 GMC Sierra 2500 SLT

    $34,399

    179,799 mi.
    Est. $611/mo

    Eide Ford Mandan

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    Mandan, ND (736 mi)
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  • Summit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLT

    $37,688

    143,266 mi.
    Est. $669/mo

    Gene Gorman's Auto Sales

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    Punta Gorda, FL (1,081 mi)
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  • Onyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLT

    $50,492

    102,885 mi.
    Est. $897/mo

    Tadd Jenkins Ford

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    Blackfoot, ID (1,258 mi)
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  • Summit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLT

    $42,998

    81,871 mi.
    Est. $763/mo

    AutoNation Chrysler Dodge Jeep Ram North Fort Worth

    4.6
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    Fort Worth, TX (814 mi)
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  • Black 2020 GMC Sierra 2500 SLTBlack 2020 GMC Sierra 2500 SLTBlack 2020 GMC Sierra 2500 SLTBlack 2020 GMC Sierra 2500 SLTBlack 2020 GMC Sierra 2500 SLTBlack 2020 GMC Sierra 2500 SLT

    $42,585

    $304
    71,025 mi.
    Est. $756/mo

    Extreme Chrysler Dodge Jeep RAM

    4.7
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    Jackson, MI (170 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLTRed Quartz Tintcoat 2020 GMC Sierra 2500 SLT

    $39,991

    154,998 mi.
    Est. $710/mo

    Demontrond Buick GMC

    4.8
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    Houston, TX (931 mi)

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  • Onyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLTOnyx Black 2020 GMC Sierra 2500 SLT

    $43,274

    83,918 mi.
    Est. $768/mo

    Mills GM

    4.9
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    Baxter, MN (451 mi)
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  • BLACK 2020 GMC Sierra 2500 SLTBLACK 2020 GMC Sierra 2500 SLTBLACK 2020 GMC Sierra 2500 SLTBLACK 2020 GMC Sierra 2500 SLTBLACK 2020 GMC Sierra 2500 SLTBLACK 2020 GMC Sierra 2500 SLT

    $54,995

    22,548 mi.
    Est. $976/mo

    Gortsema Motors, Inc.

    Check Availability
    Grangeville, ID (1,438 mi)
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  • Summit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLT

    $40,848

    142,940 mi.
    Est. $725/mo

    Kissner Motors

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    Grand Junction, CO (1,115 mi)
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  • Summit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLT

    $50,498

    98,716 mi.
    Est. $897/mo

    Elite Auto Sales - Idaho Falls

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    Idaho Falls, ID (1,238 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 $67,320 12 Great deals
2024 GMC Sierra 2500 SLT $62,207 11 Great deals
2023 GMC Sierra 2500 SLT $54,592 23 Good deals
2022 GMC Sierra 2500 SLT $47,771 2 Good deals
2021 GMC Sierra 2500 SLT $48,551 7 Good deals
2019 GMC Sierra 2500 SLT $40,712 10 Good deals
2018 GMC Sierra 2500 SLT $37,658 21 Good deals
2017 GMC Sierra 2500 SLT $34,278 4 Good deals

About the 2020 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 2020 GMC Sierra 2500 SLT
FAQs

How much does the 2020 GMC Sierra 2500 SLT cost?

The 2020 GMC Sierra 2500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 2500 SLT is $43,791, with pricing starting at $32,026.

What are some similar vehicles and competitors of the 2020 GMC Sierra 2500 SLT?

The 2020 GMC Sierra 2500 SLT compares to and/or competes against the following vehicles:


Is the 2020 GMC Sierra 2500 SLT reliable?

The 2020 GMC Sierra 2500 has an average reliability rating of 4.7 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2020 Sierra 2500 owners.

Ratings (23 reviews)

91% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.9
Interior
4.9
Performance
4.8
Value
4.5
Exterior
4.9
Reliability
4.7
Trims

SLT (8 styles)

Style
2WD Double Cab 149" SLT 4WD Double Cab 149" SLT 4WD Crew Cab 172" SLT 4WD Double Cab 162" SLT 2WD Crew Cab 172" SLT 2WD Double Cab 162" SLT 2WD Crew Cab 159" SLT 4WD Crew Cab 159" SLT
Inventory price
Starting at $51,000 Starting at $53,800 Starting at $55,800 Starting at $54,000 Starting at $53,000 Starting at $51,200 Starting at $52,800 Starting at $55,600
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