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  • Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4

    $51,250

    $584
    91,792 mi.
    Est. $963/mo

    John Elway Chevrolet - Broadway

    4.2
    Check Availability
    Englewood, CO (920 mi)

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  • Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4

    $45,999

    117,895 mi.
    Est. $865/mo

    Rydell Chevrolet GMC of Grand Forks

    4.6
    Check Availability
    Grand Forks, ND (620 mi)
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  • Dark Sky Metallic 2020 GMC Sierra 3500 AT4Dark Sky Metallic 2020 GMC Sierra 3500 AT4Dark Sky Metallic 2020 GMC Sierra 3500 AT4Dark Sky Metallic 2020 GMC Sierra 3500 AT4Dark Sky Metallic 2020 GMC Sierra 3500 AT4

    $56,990

    51,982 mi.
    Est. $1,071/mo

    Ressler Chevrolet

    4.6
    Check Availability
    Bozeman, MT (1,197 mi)
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  • Pacific Blue Metallic 2020 GMC Sierra 3500 AT4Pacific Blue Metallic 2020 GMC Sierra 3500 AT4Pacific Blue Metallic 2020 GMC Sierra 3500 AT4Pacific Blue Metallic 2020 GMC Sierra 3500 AT4Pacific Blue Metallic 2020 GMC Sierra 3500 AT4Pacific Blue Metallic 2020 GMC Sierra 3500 AT4

    $49,999

    163,620 mi.
    Est. $940/mo

    Future Diesel 4WD & More

    5.0
    Check Availability
    Sacramento, CA (1,783 mi)
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  • Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4

    $45,799

    $1.1K
    128,942 mi.
    Est. $861/mo

    Lagg's Automotive

    4.4
    Check Availability
    Huntington, IN (131 mi)
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  • Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4Onyx Black 2020 GMC Sierra 3500 AT4

    $56,912

    70,814 mi.
    Est. $1,070/mo

    Titus-Will Chevrolet - Tacoma

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    Tacoma, WA (1,738 mi)
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  • White 2020 GMC Sierra 3500 AT4White 2020 GMC Sierra 3500 AT4White 2020 GMC Sierra 3500 AT4White 2020 GMC Sierra 3500 AT4White 2020 GMC Sierra 3500 AT4White 2020 GMC Sierra 3500 AT4

    $58,395

    $600
    35,474 mi.
    Est. $1,098/mo

    Mid-Towne Auto Center

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    Franklin, OH (239 mi)
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  • Black 2020 GMC Sierra 3500 AT4Black 2020 GMC Sierra 3500 AT4Black 2020 GMC Sierra 3500 AT4Black 2020 GMC Sierra 3500 AT4Black 2020 GMC Sierra 3500 AT4Black 2020 GMC Sierra 3500 AT4

    $44,000

    137,031 mi.
    Est. $827/mo

    Shea Buick GMC

    4.3
    Check Availability
    Flint, MI (212 mi)
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  • Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4

    $44,000

    122,695 mi.
    Est. $827/mo

    Charbonneau Car Center

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    Dickinson, ND (823 mi)
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  • Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4

    $32,497

    221,308 mi.
    Est. $611/mo

    Diamond Buick GMC of Alexandria

    4.6
    Check Availability
    Alexandria, MN (473 mi)
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  • Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4Summit White 2020 GMC Sierra 3500 AT4

    $52,300

    65,722 mi.
    Est. $983/mo

    Baker Buick GMC Cadillac

    2.9
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    Charleston, SC (755 mi)
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  • Carbon Black Metallic 2020 GMC Sierra 3500 AT4Carbon Black Metallic 2020 GMC Sierra 3500 AT4Carbon Black Metallic 2020 GMC Sierra 3500 AT4Carbon Black Metallic 2020 GMC Sierra 3500 AT4Carbon Black Metallic 2020 GMC Sierra 3500 AT4Carbon Black Metallic 2020 GMC Sierra 3500 AT4

    $47,500

    $2.4K
    121,865 mi.
    Est. $893/mo

    Cortes Nissan

    4.6
    Check Availability
    Spokane Valley, WA (1,500 mi)
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  • Not Priced

    88,676 mi.
    Est. $0/mo

    Junction Auto Family - Chrysler Jeep Dodge Ram Buick GMC

    4.9
    Check Availability
    Chardon, OH (334 mi)
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  • $52,900

    75,787 mi.
    Est. $994/mo

    Gwatney Buick GMC

    4.6
    Check Availability
    North Little Rock, AR (548 mi)
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  • Black 2020 GMC Sierra 3500 AT4

    $63,995

    52,000 mi.
    Est. $1,203/mo

    Earnest Auto Sales

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    Medford, OR (1,792 mi)
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  • $55,999

    70,154 mi.
    Est. $1,053/mo

    Chevrolet GMC of Fairbanks

    4.8
    Check Availability
    Fairbanks, AK (2,788 mi)
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GMC Sierra 3500 prices by year

Model year Average price Deals
2026 GMC Sierra 3500 AT4 6 Good deals
2025 GMC Sierra 3500 AT4 $76,788 23 Good deals
2024 GMC Sierra 3500 AT4 $68,376 7 Great deals
2023 GMC Sierra 3500 AT4 $60,727 6 Great deals
2022 GMC Sierra 3500 AT4 $53,778 7 Great deals

About the 2020 GMC Sierra 3500 AT4

Basics

AT4 shown.

Seating
5
Door count
4
Drivetrain
Four 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 3500 AT4
FAQs

How much does the 2020 GMC Sierra 3500 AT4 cost?

The 2020 GMC Sierra 3500 AT4 price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 3500 AT4 is $50,569, with pricing starting at $32,497.

What are some similar vehicles and competitors of the 2020 GMC Sierra 3500 AT4?

The 2020 GMC Sierra 3500 AT4 compares to and/or competes against the following vehicles:


Is the 2020 GMC Sierra 3500 AT4 reliable?

The 2020 GMC Sierra 3500 has an average reliability rating of 4.9 out of 5 according to Cars.com consumers. Find real-world reliability insights within consumer reviews from 2020 Sierra 3500 owners.

Ratings (9 reviews)

100% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.9
Interior
4.9
Performance
4.9
Value
4.7
Exterior
5.0
Reliability
4.9
Trims

AT4 (2 styles)

Style
4WD Crew Cab 159" AT4 4WD Crew Cab 172" AT4
Inventory price
Starting at $59,500 Starting at $59,700
Combined MPG
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)
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GMC Sierra 3500 trims