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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

    $47,009

    50,526 mi.
    Est. $886/mo

    LaFontaine Buick GMC of Highland

    4.7
    Highland, MI (210 mi)
    Check Availability

  • 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

    $49,594

    $1K
    57,737 mi.
    Est. $934/mo

    CAL Cars CDA

    Coeur d'Alene, ID (1,475 mi)
    Check Availability

  • 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

    $42,647

    119,241 mi.
    Est. $803/mo

    Thompson Buick, GMC, Cadillac

    4.9
    Springfield, MO (444 mi)
    Check Availability

  • 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

    $47,162

    77,231 mi.
    Est. $888/mo

    Huntington Beach Ford

    4.5
    Huntington Beach, CA (1,741 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

    $52,298

    24,788 mi.
    Est. $985/mo

    i.g. Burton Lewes Automall Chevrolet Buick GMC

    4.5
    Lewes, DE (692 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

    $41,193

    $208
    93,528 mi.
    Est. $776/mo

    Mills GM

    4.8
    Baxter, MN (451 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

    $43,095

    79,541 mi.
    Est. $812/mo

    Imperial Subaru

    4.7
    North Attleborough, MA (837 mi)
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  • Dark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLT

    $43,994

    95,999 mi.
    Est. $829/mo

    Lee GMC Truck Center

    4.5
    Auburn, ME (892 mi)
    Check Availability
  • 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

    $43,533

    $3.4K
    50,337 mi.
    Est. $820/mo

    Schumacher Chevrolet Buick of Boonton

    Boonton, NJ (689 mi)
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  • Red 2020 GMC Sierra 2500 SLTRed 2020 GMC Sierra 2500 SLTRed 2020 GMC Sierra 2500 SLTRed 2020 GMC Sierra 2500 SLTRed 2020 GMC Sierra 2500 SLTRed 2020 GMC Sierra 2500 SLT

    $33,289

    159,185 mi.
    Est. $627/mo

    Billion Auto - Southtown (Chevrolet Buick)

    Worthing, SD (477 mi)
    Check Availability
  • 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

    $36,160

    153,367 mi.
    Est. $681/mo

    Kunes Chevrolet GMC of Elkhorn

    3.9
    Elkhorn, WI (71 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

    $47,009

    50,526 mi.
    Est. $886/mo

    LaFontaine Buick GMC of Highland

    4.7
    Highland, MI (210 mi)
    Check Availability
  • 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

    $42,646

    92,821 mi.
    Est. $803/mo

    Heritage Buick GMC

    4.6
    Rockwall, TX (786 mi)
    Check Availability
  • 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

    $52,844

    61,099 mi.
    Est. $996/mo

    Woodhouse Buick GMC of Omaha

    4.4
    Omaha, NE (440 mi)
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  • Red 2020 GMC Sierra 2500 SLTRed 2020 GMC Sierra 2500 SLTRed 2020 GMC Sierra 2500 SLTRed 2020 GMC Sierra 2500 SLTRed 2020 GMC Sierra 2500 SLTRed 2020 GMC Sierra 2500 SLT

    $29,900

    120,750 mi.
    Est. $563/mo

    Marsh Auto Sales LLC

    4.7
    Brandon Twp, MI (224 mi)
    Check Availability
  • Dark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLT

    $42,499

    117,276 mi.
    Est. $801/mo

    Billion Auto - Buick GMC

    4.3
    Sioux Falls, SD (476 mi)
    Check Availability
  • 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

    $50,872

    52,428 mi.
    Est. $958/mo

    Laura Buick GMC

    4.5
    Collinsville, IL (254 mi)
    Check Availability
  • 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

    $37,900

    100,119 mi.
    Est. $714/mo

    Marsh Auto Sales LLC

    4.7
    Brandon Twp, MI (224 mi)
    Check Availability
  • Dark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLTDark Sky Metallic 2020 GMC Sierra 2500 SLT

    $39,999

    129,529 mi.
    Est. $754/mo

    Supreme Auto

    Fair Oaks, CA (1,776 mi)
    Check Availability
  • 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

    $37,202

    $1.4K
    148,252 mi.
    Est. $701/mo

    Tom Clark Chevrolet

    Denton, TX (794 mi)
    Check Availability
  • 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

    $28,990

    184,155 mi.
    Est. $546/mo

    GR8 Auto LLC

    Mint Hill, NC (598 mi)
    Check Availability
  • 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

    $36,999

    158,604 mi.
    Est. $697/mo

    Safeway Automotive

    Grant, MI (138 mi)
    Check Availability
  • Summit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLT

    $46,988

    55,252 mi.
    Est. $885/mo

    Mangino Chevrolet

    4.2
    Amsterdam, NY (690 mi)
  • Cardinal Red 2020 GMC Sierra 2500 SLT

    $31,180

    128,079 mi.
    Est. $587/mo

    Macke Motors Inc.

    2.8
    Lake City, IA (366 mi)
    Check Availability
  • Dark Sky Metallic 2020 GMC Sierra 2500 SLT

    $43,993

    111,251 mi.
    Est. $829/mo

    Brookings Auto Mall

    3.4
    Brookings, SD (490 mi)
    Check Availability

GMC Sierra 2500 prices by year

Model year Average price Deals
2026 GMC Sierra 2500 SLT 16 Great deals
2025 GMC Sierra 2500 SLT $65,304 29 Great deals
2024 GMC Sierra 2500 SLT $59,967 34 Great deals
2023 GMC Sierra 2500 SLT $52,422 9 Great deals
2022 GMC Sierra 2500 SLT $48,025 8 Great deals
2021 GMC Sierra 2500 SLT $46,106 6 Great deals
2019 GMC Sierra 2500 SLT $37,225 5 Great deals
2018 GMC Sierra 2500 SLT $36,585 8 Great 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 $41,036, with pricing starting at $28,990.

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)

2020 GMC Sierra 2500 trims