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  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $47,905

    $161
    85,111 mi.
    Est. $902/mo

    Walt Massey Chrysler Dodge Jeep RAM of Lucedale

    4.7
    Lucedale, MS (761 mi)
    Check Availability

  • Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4

    $48,199

    $500
    84,467 mi.
    Est. $908/mo

    Cox Chevrolet

    4.7
    Bradenton, FL (1,037 mi)
    Check Availability

  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $47,905

    $161
    85,111 mi.
    Est. $902/mo

    Walt Massey Chrysler Dodge Jeep RAM of Lucedale

    4.7
    Lucedale, MS (761 mi)
    Check Availability

  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $49,911

    $3.9K
    67,776 mi.
    Est. $940/mo

    Folsom Lake Toyota

    4.6
    Folsom, CA (1,773 mi)
    Check Availability
  • Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4

    $45,699

    106,873 mi.
    Est. $861/mo

    Strosnider Chevrolet

    4.8
    Hopewell, VA (635 mi)
    Check Availability
  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $47,194

    $686
    92,632 mi.
    Est. $889/mo

    Corwin Chrysler Dodge Jeep Ram

    4.4
    Fargo, ND (570 mi)
    Check Availability
  • Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4

    $49,942

    82,751 mi.
    Est. $941/mo

    Stingray Chevrolet

    4.6
    Plant City, FL (1,006 mi)
    Check Availability
  • Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4

    $54,999

    17,795 mi.
    Est. $1,036/mo

    Lithia Chevrolet GMC of Helena

    4.4
    Helena, MT (1,245 mi)
    Check Availability
  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $52,299

    73,694 mi.
    Est. $985/mo

    Woodhouse Chrysler Dodge Jeep Ram of Bellevue

    Bellevue, NE (432 mi)
    Check Availability

  • Black Metallic 2020 GMC Sierra 2500 AT4Black Metallic 2020 GMC Sierra 2500 AT4Black Metallic 2020 GMC Sierra 2500 AT4Black Metallic 2020 GMC Sierra 2500 AT4Black Metallic 2020 GMC Sierra 2500 AT4Black Metallic 2020 GMC Sierra 2500 AT4

    $45,489

    $2K
    106,252 mi.
    Est. $857/mo

    Toyota of Murray

    4.6
    Murray, KY (368 mi)
    Check Availability
  • Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4Dark Sky Metallic 2020 GMC Sierra 2500 AT4

    $48,864

    93,400 mi.
    Est. $921/mo

    Santa Margarita Ford

    5.0
    Rancho Santa Margarita, CA (1,723 mi)
    Check Availability
  • White 2020 GMC Sierra 2500 AT4White 2020 GMC Sierra 2500 AT4White 2020 GMC Sierra 2500 AT4White 2020 GMC Sierra 2500 AT4White 2020 GMC Sierra 2500 AT4White 2020 GMC Sierra 2500 AT4

    $48,998

    $1K
    98,136 mi.
    Est. $923/mo

    CarMax Independence

    4.6
    Independence, MO (405 mi)
    Check Availability
  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $36,800

    $400
    154,144 mi.
    Est. $693/mo

    AutoSavvy Post Falls

    4.2
    Post Falls, ID (1,487 mi)
    Check Availability
  • Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4Black 2020 GMC Sierra 2500 AT4

    $42,225

    $1K
    112,761 mi.
    Est. $795/mo

    Natchez Ford

    4.6
    Natchez, MS (746 mi)
    Check Availability
  • Brownstone Metallic 2020 GMC Sierra 2500 AT4Brownstone Metallic 2020 GMC Sierra 2500 AT4Brownstone Metallic 2020 GMC Sierra 2500 AT4Brownstone Metallic 2020 GMC Sierra 2500 AT4Brownstone Metallic 2020 GMC Sierra 2500 AT4Brownstone Metallic 2020 GMC Sierra 2500 AT4

    $45,894

    97,097 mi.
    Est. $865/mo

    Perkins Motor Plex of Paducah

    Paducah, KY (336 mi)
    Check Availability

  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $48,773

    97,167 mi.
    Est. $919/mo

    Kendall Ford of Bend

    4.8
    Bend, OR (1,697 mi)
    Check Availability
  • Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4Red Quartz Tintcoat 2020 GMC Sierra 2500 AT4

    $44,990

    117,192 mi.
    Est. $848/mo

    JT's Kia of Columbia - Killian

    Columbia, SC (647 mi)
    Check Availability
  • Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4

    $60,520

    32,987 mi.
    Est. $1,140/mo

    Eureka Chrysler Dodge Jeep Ram

    Eureka, CA (1,884 mi)
    Check Availability
  • Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4

    $54,394

    $4.4K
    53,771 mi.
    Est. $1,025/mo

    Gill Madera GMC

    MADERA, CA (1,754 mi)
    Check Availability
  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $51,172

    86,876 mi.
    Est. $964/mo

    Michael's Auto Plaza

    East Greenbush, NY (714 mi)
    Check Availability
  • Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4Carbon Black Metallic 2020 GMC Sierra 2500 AT4

    $47,241

    77,355 mi.
    Est. $890/mo

    Rivard Buick GMC

    4.7
    Tampa, FL (1,008 mi)
    Check Availability

  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $44,051

    135,331 mi.
    Est. $830/mo

    Rick Hill Imports - BMW Mercedes-Benz

    Kingsport, TN (458 mi)
    Check Availability
  • Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4Onyx Black 2020 GMC Sierra 2500 AT4

    $41,168

    $1K
    94,577 mi.
    Est. $776/mo

    Ed Morse Chevy Buick GMC North

    4.4
    DeWitt, IA (151 mi)
    Check Availability
  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $49,944

    $200
    87,604 mi.
    Est. $941/mo

    Ron Dupratt Ford

    4.9
    Vacaville, CA (1,818 mi)
    Check Availability
  • Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4Pacific Blue Metallic 2020 GMC Sierra 2500 AT4

    $47,571

    101,513 mi.
    Est. $896/mo

    Markley Honda

    4.6
    Fort Collins, CO (910 mi)
    Check Availability
  • Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4Summit White 2020 GMC Sierra 2500 AT4

    $41,499

    $500
    143,514 mi.
    Est. $782/mo

    AutoNation Buick GMC West

    4.1
    Golden, CO (929 mi)
    Check Availability

GMC Sierra 2500 prices by year

Model year Average price Deals
2026 GMC Sierra 2500 AT4 28 Great deals
2025 GMC Sierra 2500 AT4 $68,757 64 Great deals
2024 GMC Sierra 2500 AT4 $64,392 108 Great deals
2023 GMC Sierra 2500 AT4 $55,168 33 Great deals
2022 GMC Sierra 2500 AT4 $52,404 34 Great deals
2021 GMC Sierra 2500 AT4 $50,020 19 Great deals

About the 2020 GMC Sierra 2500 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 2500 AT4
FAQs

How much does the 2020 GMC Sierra 2500 AT4 cost?

The 2020 GMC Sierra 2500 AT4 price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 2500 AT4 is $46,969, with pricing starting at $30,787.

What are some similar vehicles and competitors of the 2020 GMC Sierra 2500 AT4?

The 2020 GMC Sierra 2500 AT4 compares to and/or competes against the following vehicles:


Is the 2020 GMC Sierra 2500 AT4 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

AT4 (2 styles)

Style
4WD Crew Cab 172" AT4 4WD Crew Cab 159" AT4
Inventory price
Starting at $58,500 Starting at $58,300
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)

2020 GMC Sierra 2500 trims