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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $45,995

    30,035 mi.
    Est. $865/mo

    Automotive Avenues

    4.8
    Check Availability
    Wall Township, NJ (713 mi)

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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $35,029

    $1.9K
    78,851 mi.
    Est. $658/mo

    Cape Coral Chrysler Dodge Jeep Ram

    4.2
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    Cape Coral, FL (1,100 mi)

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  • Pacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLT

    $27,000

    150,191 mi.
    Est. $508/mo

    Kirksville Motor Company

    4.9
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    Kirksville, MO (282 mi)
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  • White 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLT

    $35,750

    66,794 mi.
    Est. $672/mo

    Blade Chevrolet

    4.8
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    Mount Vernon, WA (1,735 mi)
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  • Satin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLT

    $25,995

    $1K
    136,900 mi.
    Est. $489/mo

    Holler Honda

    4.7
    Check Availability
    Orlando, FL (986 mi)
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  • Red Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLTRed Quartz Tintcoat 2020 GMC Sierra 1500 SLT

    $36,250

    $745
    65,782 mi.
    Est. $681/mo

    Ferman Buick GMC

    4.8
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    Lutz, FL (991 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $31,990

    118,270 mi.
    Est. $601/mo

    Stan McNabb Chevrolet Buick GMC Cadillac

    4.4
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    Tullahoma, TN (455 mi)
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  • Dark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLT

    $40,900

    55,229 mi.
    Est. $769/mo

    Porsche of Jackson

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    Ridgeland, MS (668 mi)

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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $33,959

    $500
    63,217 mi.
    Est. $638/mo

    Sansone Rt 1 Auto Mall

    4.9
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    Avenel, NJ (700 mi)
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  • White Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLT

    $33,500

    $339
    114,209 mi.
    Est. $630/mo

    City Limits Nissan

    4.6
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    Austin, TX (984 mi)
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  • Dark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLTDark Sky Metallic 2020 GMC Sierra 1500 SLT

    $32,999

    $296
    60,232 mi.
    Est. $620/mo

    Southwest Kia of Mesquite

    4.1
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    Mesquite, TX (796 mi)
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  • Pacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLTPacific Blue Metallic 2020 GMC Sierra 1500 SLT

    $32,999

    68,577 mi.
    Est. $620/mo

    Westway Ford

    4.4
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    Irving, TX (807 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $40,988

    76,179 mi.
    Est. $770/mo

    Stevenson Hendrick Mazda Wilmington

    4.9
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    Wilmington, NC (749 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $32,649

    114,072 mi.
    Est. $614/mo

    Auto Gallery Chevrolet GMC, Inc.

    4.9
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    LaGrange, GA (628 mi)

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  • Steel Metallic 2020 GMC Sierra 1500 SLTSteel Metallic 2020 GMC Sierra 1500 SLTSteel Metallic 2020 GMC Sierra 1500 SLTSteel Metallic 2020 GMC Sierra 1500 SLTSteel Metallic 2020 GMC Sierra 1500 SLTSteel Metallic 2020 GMC Sierra 1500 SLT

    $42,000

    $999
    39,045 mi.
    Est. $789/mo

    Rairdon's Chrysler Dodge Jeep RAM of Kirkland

    4.2
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    Kirkland, WA (1,725 mi)
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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $35,767

    $351
    56,941 mi.
    Est. $672/mo

    Volkswagen of North Tampa

    4.5
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    Tampa, FL (999 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $32,322

    $559
    74,056 mi.
    Est. $608/mo

    Park Place Acura

    4.3
    Check Availability
    Plano, TX (791 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $31,995

    117,549 mi.
    Est. $601/mo

    Carville's Auto Mart

    4.7
    Check Availability
    Grand Junction, CO (1,116 mi)
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  • White Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLTWhite Frost Tricoat 2020 GMC Sierra 1500 SLT

    $40,153

    63,563 mi.
    Est. $755/mo

    AutoNation Chrysler Dodge Jeep Ram

    4.0
    Check Availability
    Phoenix, AZ (1,447 mi)
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  • Deep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLTDeep Mahogany Metallic 2020 GMC Sierra 1500 SLT

    $37,393

    54,188 mi.
    Est. $703/mo

    Spitzer Chevrolet GMC Cadillac of Dubois

    4.6
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    DuBois, PA (462 mi)

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  • White 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLTWhite 2020 GMC Sierra 1500 SLT

    $37,300

    92,837 mi.
    Est. $701/mo

    McKenzie Buick GMC

    4.8
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    Milton, FL (780 mi)
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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $40,422

    $337
    30,289 mi.
    Est. $760/mo

    Hennessy Porsche

    4.9
    Check Availability
    Roswell, GA (571 mi)
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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $37,874

    81,654 mi.
    Est. $712/mo

    Olathe Dodge Chrysler Jeep RAM

    4.1
    Check Availability
    Olathe, KS (428 mi)
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  • Onyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLTOnyx Black 2020 GMC Sierra 1500 SLT

    $37,999

    54,416 mi.
    Est. $714/mo

    Steve Schmitt, Inc.

    4.6
    Check Availability
    Highland, IL (242 mi)
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  • Satin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLT

    $35,480

    87,023 mi.
    Est. $667/mo

    Herlong Ford

    4.7
    Check Availability
    Edgefield, SC (642 mi)
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  • Satin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLTSatin Steel Metallic 2020 GMC Sierra 1500 SLT

    $33,000

    66,765 mi.
    Est. $620/mo

    Van Horn Ford of Lomira

    4.9
    Check Availability
    Lomira, WI (125 mi)

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  • Summit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLTSummit White 2020 GMC Sierra 1500 SLT

    $35,097

    $700
    88,068 mi.
    Est. $660/mo

    Bob Howard Chrysler Dodge Jeep RAM

    4.6
    Check Availability
    Oklahoma City, OK (686 mi)
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GMC Sierra 1500 prices by year

Model year Average price Deals
2026 GMC Sierra 1500 SLT 50 Great deals
2025 GMC Sierra 1500 SLT $45,212 540 Great deals
2024 GMC Sierra 1500 SLT $45,992 169 Great deals
2023 GMC Sierra 1500 SLT $44,401 67 Great deals
2022 GMC Sierra 1500 SLT $40,708 49 Great deals
2021 GMC Sierra 1500 SLT $35,873 95 Great deals
2019 GMC Sierra 1500 SLT $32,655 19 Great deals
2018 GMC Sierra 1500 SLT $28,032 56 Great deals
2017 GMC Sierra 1500 SLT $24,888 41 Great deals

About the 2020 GMC Sierra 1500 SLT

Basics

SLT shown.

Seating
5
Door count
4
Drivetrain
Rear Wheel Drive
Combined MPG
19
Transmission
10-Speed A/T
Engine
355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel)
Side view of the 2020 GMC Sierra 1500 SLT
FAQs

How much does the 2020 GMC Sierra 1500 SLT cost?

The 2020 GMC Sierra 1500 SLT price depends on several factors, including optional features, mileage, vehicle history and location. The nationwide average price for a 2020 Sierra 1500 SLT is $33,790, with pricing starting at $21,500.

What is the MPG of the 2020 GMC Sierra 1500 SLT?

The 2020 GMC Sierra 1500 SLT offers up to 17 MPG in city driving and 23 MPG on the highway for a combined rating of 19 MPG.

These figures are based on EPA mileage ratings and are for comparison purposes only. The actual mileage will vary depending on the selected vehicle options, driving conditions, driving habits, vehicle maintenance, and other factors.

What are some similar vehicles and competitors of the 2020 GMC Sierra 1500 SLT?

The 2020 GMC Sierra 1500 SLT compares to and/or competes against the following vehicles:


Is the 2020 GMC Sierra 1500 SLT reliable?

The 2020 GMC Sierra 1500 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 1500 owners.

Ratings (69 reviews)

91% of drivers recommend this car

Rating breakdown (out of 5):
Comfort
4.9
Interior
4.8
Performance
4.8
Value
4.6
Exterior
4.9
Reliability
4.7
Trims

SLT (6 styles)

Style
4WD Crew Cab 147" SLT 2WD Crew Cab 147" SLT 4WD Crew Cab 157" SLT 4WD Double Cab 147" SLT 2WD Double Cab 147" SLT 2WD Crew Cab 157" SLT
Inventory price
Starting at $50,400 Starting at $46,900 Starting at $50,700 Starting at $48,000 Starting at $44,500 Starting at $47,200
Combined MPG
18 19 18 18 19 19
Engine
420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 420.0-hp, 6.2-liter, 8 Cylinder Engine (Gasoline Fuel) 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel) 355.0-hp, 5.3-liter, 8 Cylinder Engine (Gasoline Fuel)
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2020 GMC Sierra 1500 SLT by popular city

GMC Sierra 1500 trims