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  • Onyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLE

    $41,999

    $996
    100,699 mi.
    Est. $746/mo

    Phil Long Ford of Chapel Hills

    4.5
    Colorado Springs, CO (924 mi)
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  • Onyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLE

    $36,485

    107,544 mi.
    Est. $648/mo

    Ira Toyota Saco

    4.5
    Saco, ME (880 mi)
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  • White 2020 GMC Sierra 2500 SLEWhite 2020 GMC Sierra 2500 SLEWhite 2020 GMC Sierra 2500 SLEWhite 2020 GMC Sierra 2500 SLEWhite 2020 GMC Sierra 2500 SLEWhite 2020 GMC Sierra 2500 SLE

    $43,222

    83,803 mi.
    Est. $767/mo

    Karl Malone Ford Park City

    Park City, UT (1,240 mi)
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  • Onyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLEOnyx Black 2020 GMC Sierra 2500 SLE

    $39,999

    73,539 mi.
    Est. $710/mo

    Choice Auto Sales

    3.2
    Murrysville, PA (426 mi)
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  • Dark Sky Metallic 2020 GMC Sierra 2500 SLEDark Sky Metallic 2020 GMC Sierra 2500 SLEDark Sky Metallic 2020 GMC Sierra 2500 SLEDark Sky Metallic 2020 GMC Sierra 2500 SLEDark Sky Metallic 2020 GMC Sierra 2500 SLEDark Sky Metallic 2020 GMC Sierra 2500 SLE

    $23,751

    $450
    189,789 mi.
    Est. $422/mo

    Bachman CDJR Hyundai

    3.3
    Jeff, IN (269 mi)
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  • Brownstone Metallic 2020 GMC Sierra 2500 SLEBrownstone Metallic 2020 GMC Sierra 2500 SLEBrownstone Metallic 2020 GMC Sierra 2500 SLE

    $43,952

    43,093 mi.
    Est. $780/mo

    Coughlin Circleville

    Circleville, OH (293 mi)
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  • Dark Sky Metallic 2020 GMC Sierra 2500 SLEDark Sky Metallic 2020 GMC Sierra 2500 SLEDark Sky Metallic 2020 GMC Sierra 2500 SLEDark Sky Metallic 2020 GMC Sierra 2500 SLEDark Sky Metallic 2020 GMC Sierra 2500 SLEDark Sky Metallic 2020 GMC Sierra 2500 SLE

    $34,000

    124,742 mi.
    Est. $604/mo

    Blaise Alexander Chevrolet of Muncy

    3.6
    Muncy, PA (560 mi)
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  • $26,000

    186,592 mi.
    Est. $462/mo

    Fairway Chevrolet GMC

    4.3
    Calcutta, OH (376 mi)
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  • $39,595

    63,246 mi.
    Est. $703/mo

    Bob Johnson Used

    4.1
    Rochester, NY (519 mi)
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  • Summit White 2020 GMC Sierra 2500 SLE

    $36,685

    94,991 mi.
    Est. $651/mo

    Uinta CDJR

    Evanston, WY (1,204 mi)
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  • Silver 2020 GMC Sierra 2500 SLESilver 2020 GMC Sierra 2500 SLESilver 2020 GMC Sierra 2500 SLESilver 2020 GMC Sierra 2500 SLESilver 2020 GMC Sierra 2500 SLESilver 2020 GMC Sierra 2500 SLE

    Not Priced

    44,400 mi.

    Fairly Reliable Bob's

    4.3
    Boise, ID (1,448 mi)
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GMC Sierra 2500 prices by year

Model year Average price Deals
2026 GMC Sierra 2500 SLE 2 Good deals
2025 GMC Sierra 2500 SLE $59,448 8 Great deals
2024 GMC Sierra 2500 SLE $50,667 14 Great deals
2023 GMC Sierra 2500 SLE $45,805 6 Great deals
2022 GMC Sierra 2500 SLE $42,598 16 Great deals
2021 GMC Sierra 2500 SLE $39,794 12 Good deals

About the 2020 GMC Sierra 2500 SLE

Basics

SLE shown.

Seating
3
Door count
2
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 SLE
FAQs

How much does the 2020 GMC Sierra 2500 SLE cost?

The 2020 GMC Sierra 2500 SLE price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 2500 SLE is $36,828, with pricing starting at $23,751.

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

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


Is the 2020 GMC Sierra 2500 SLE 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

SLE (10 styles)

Style
4WD Reg Cab 142" SLE 2WD Reg Cab 142" SLE 2WD Crew Cab 172" SLE 2WD Crew Cab 159" SLE 4WD Double Cab 162" SLE 4WD Crew Cab 159" SLE 2WD Double Cab 162" SLE 4WD Double Cab 149" SLE 2WD Double Cab 149" SLE 4WD Crew Cab 172" SLE
Inventory price
Starting at $43,200 Starting at $40,400 Starting at $44,400 Starting at $44,200 Starting at $45,400 Starting at $47,000 Starting at $42,600 Starting at $45,200 Starting at $42,400 Starting at $47,200
Combined MPG
0 0 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) 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