Skip to main content
Best match Lowest price Highest price Lowest mileage Highest mileage Nearest location Best deal Newest year Oldest year Newest listed Oldest listed
Skip to Filters
  • 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

    $31,971

    195,529 mi.
    Est. $601/mo

    Shottenkirk Chevrolet KIA of Quincy

    4.8
    Check Availability
    Quincy, IL (237 mi)
    Quick view
  • 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

    $46,000

    80,422 mi.
    Est. $865/mo

    Koons Ford of Baltimore

    4.4
    Check Availability
    Windsor Mill, MD (598 mi)
    Quick view
  • 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

    $44,998

    83,918 mi.
    Est. $846/mo

    Mills GM

    4.8
    Check Availability
    Baxter, MN (451 mi)
    Quick view
  • 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

    $39,985

    $4K
    111,798 mi.
    Est. $752/mo

    Bill Dodge GMC Buick

    4.5
    Check Availability
    Westbrook, ME (885 mi)
    Quick view
  • 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

    71,025 mi.
    Est. $800/mo

    Extreme Chrysler Dodge Jeep RAM

    4.3
    Check Availability
    Jackson, MI (170 mi)
    Quick view
  • 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

    $39,999

    $1.9K
    128,660 mi.
    Est. $752/mo

    Murdock Volkswagen of Logan

    4.7
    Check Availability
    Logan, UT (1,242 mi)
    Quick view
  • 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

    $49,682

    38,858 mi.
    Est. $934/mo

    Forest City Ford

    5.0
    Check Availability
    Forest City, IA (320 mi)
    Quick view
  • 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

    $38,558

    119,786 mi.
    Est. $725/mo

    Elite Auto Sales

    Check Availability
    Idaho Falls, ID (1,238 mi)
    Quick view
  • 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

    $55,995

    22,548 mi.
    Est. $1,053/mo

    Gortsema Motors, Inc.

    Check Availability
    Grangeville, ID (1,438 mi)
    Quick view
  • 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

    $37,995

    111,050 mi.
    Est. $714/mo

    Nielsen Motors

    Check Availability
    Humboldt, IA (341 mi)
    Quick view
  • 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

    $42,820

    73,501 mi.
    Est. $805/mo

    Heafner Motors

    Check Availability
    Batesville, MS (539 mi)
    Quick view
  • 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

    $39,499

    123,648 mi.
    Est. $742/mo

    Auto Haus of Yorktown

    4.4
    Check Availability
    Yorktown, VA (677 mi)
    Quick view
  • 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

    $44,551

    $330
    111,894 mi.
    Est. $837/mo

    Tom Bell Chevrolet

    4.3
    Check Availability
    Redlands, CA (1,689 mi)
    Quick view
  • 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 SLT

    $47,998

    68,626 mi.
    Est. $902/mo

    Pat McGrath Chevyland

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

    $48,299

    $100
    68,226 mi.
    Est. $908/mo

    Markquart Motors

    3.9
    Check Availability
    Chippewa Falls, WI (282 mi)
    Quick view
  • 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

    $43,985

    $1K
    68,067 mi.
    Est. $827/mo

    BidCars Boston

    4.9
    Check Availability
    Walpole, MA (842 mi)
    Quick view
  • 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

    $39,795

    $200
    95,724 mi.
    Est. $748/mo

    Wheels & Deals

    Check Availability
    Pomeroy, OH (355 mi)
    Quick view
  • Summit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLTSummit White 2020 GMC Sierra 2500 SLT

    $40,859

    142,923 mi.
    Est. $768/mo

    Kissner Motors

    Check Availability
    Grand Junction, CO (1,115 mi)
    Quick view
  • Blue 2020 GMC Sierra 2500 SLTBlue 2020 GMC Sierra 2500 SLTBlue 2020 GMC Sierra 2500 SLTBlue 2020 GMC Sierra 2500 SLTBlue 2020 GMC Sierra 2500 SLTBlue 2020 GMC Sierra 2500 SLT

    $46,450

    93,339 mi.
    Est. $873/mo

    Golden Motors

    Check Availability
    Lexington, SC (643 mi)
    Quick view
  • 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

    $45,491

    $500
    117,300 mi.
    Est. $855/mo

    Speck Buick GMC

    Check Availability
    Pasco, WA (1,586 mi)
    Quick view
  • 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

    $37,995

    55,042 mi.
    Est. $714/mo

    Rite Auto

    3.7
    Check Availability
    Arlington, TX (817 mi)
    Quick view
  • 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 SLT

    $46,995

    47,211 mi.
    Est. $883/mo

    Murdock GM

    4.4
    Check Availability
    Logan, UT (1,242 mi)
    Quick view

GMC Sierra 2500 prices by year

Model year Average price Deals
2026 GMC Sierra 2500 SLT
2025 GMC Sierra 2500 SLT $68,638 10 Great deals
2024 GMC Sierra 2500 SLT $62,805 78 Good deals
2023 GMC Sierra 2500 SLT $54,630 9 Great deals
2022 GMC Sierra 2500 SLT $49,306 14 Great deals
2021 GMC Sierra 2500 SLT $48,444 25 Good deals
2019 GMC Sierra 2500 SLT $40,472 26 Good deals
2018 GMC Sierra 2500 SLT $38,865 23 Good deals
2017 GMC Sierra 2500 SLT $35,481 22 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 $43,457, with pricing starting at $31,971.

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)
Skip to Listings
Best match Lowest price Highest price Lowest mileage Highest mileage Nearest location Best deal Newest year Oldest year Newest listed Oldest listed

GMC Sierra 2500 trims